M Glossary Terms

M Protein, also called monoclonal protein, is an abnormal antibody found in large amounts in the blood or urine of people with multiple myeloma and some other plasma cell cancers. Doctors use it to help detect and monitor these diseases. It may also appear under related names such as Monoclonal Protein.

M-EDTA, also called minocycline-EDTA, is a combination of an antibiotic and a chemical that helps prevent blood clots. It is being studied to help stop bacterial infections that can happen in catheters—thin tubes used to deliver fluids or medications into the body. This combination may reduce infections by preventing bacteria from forming protective layers on catheter surfaces.

M200, also called volociximab, is a laboratory-made monoclonal antibody being studied as a treatment for some cancers. It works by attaching to a protein on blood vessel cells in tumors, blocking the growth of new blood vessels that tumors need to grow. This type of medicine is known as an angiogenesis inhibitor and is still being tested in clinical trials.

Ma Huang, also called Ephedra, is a plant used in traditional medicine to help with breathing problems like asthma and cough. It has also been promoted for weight loss and energy. However, Ma Huang can raise blood pressure and heart rate and may interfere with some cancer treatments. Because of safety concerns, the FDA has banned dietary supplements containing Ma Huang. Patients should always talk with their healthcare team before using products with this ingredient.

Machine learning is a type of computer technology that helps computers learn from large amounts of information to recognize patterns and make decisions without being directly programmed. It is part of artificial intelligence (AI) and can support cancer care by helping doctors detect cancer earlier, improve diagnosis, and plan treatments more effectively.

A macrobiotic diet is a mostly plant-based eating plan focusing on whole grains, organic vegetables, fermented foods, and beans. It is low in fat and processed carbohydrates and can be adjusted based on age, health, activity, and climate. There is no scientific evidence that it can prevent or treat cancer. If you consider this diet during cancer care, discuss it with your healthcare team to ensure it fits safely with your treatment and nutrition needs.

Macrocalcification is a small deposit of calcium in the breast that shows up on a mammogram but cannot be felt. It usually happens due to aging, old injuries, or inflammation and is generally not linked to breast cancer. Finding macrocalcifications is common and often considered a normal part of breast changes over time.

Macroglobulinemia is a condition where the blood has high levels of large proteins, making it thicker and harder to flow through small blood vessels. One type, called Waldenström macroglobulinemia, is a rare cancer affecting certain white blood cells. This condition can affect blood flow and may require treatments to manage symptoms and the underlying cause.

A macrophage is a type of white blood cell that helps protect the body by surrounding and killing germs, cleaning up dead cells, and activating other parts of the immune system. These cells play an important role in keeping the body healthy and can be involved in cancer-related processes. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Macular degeneration is an eye condition that slowly damages the central part of the retina, called the macula. This affects sharp, central vision needed for activities like reading and driving. It most often occurs in people over 50 and is also known as age-related macular degeneration (AMD). It can cause blurred or distorted vision but does not cause pain.

Macular edema is swelling in the macula, the central part of the retina at the back of the eye, caused by fluid buildup. It can blur or distort vision, dull colors, and worsen over time. It often happens in people with diabetes but can also result from eye surgery, injury, tumors, or certain medications.

Maffucci syndrome is a very rare condition that causes noncancerous cartilage growths inside bones, often in the hands or feet. It can lead to bone deformities, fractures, and shortened limbs. People with this syndrome also develop benign blood vessel tumors on the skin and have a higher risk of certain cancers, including cartilage cancer of the bone and cancers of the ovary or liver.

Mafosfamide is a chemotherapy drug related to cyclophosphamide. It belongs to a group called alkylating agents and can be given directly into the fluid around the brain and spinal cord (intrathecal infusion). Mafosfamide is being studied in cancer treatment and may be part of certain treatment plans or clinical trials.

MAGE-3 antigen is a protein found in many cancer cells but rarely in normal tissues. Researchers are studying vaccines made from parts of this protein to help the immune system recognize and fight cancer. It may be mentioned in some cancer treatments or clinical trials involving immunotherapy. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Magnesium is a mineral important for keeping muscles, nerves, and bones healthy. It also helps the body make energy and build proteins. In cancer care, doctors may check magnesium levels because some treatments or the cancer itself can lower magnesium, which can cause symptoms like muscle cramps or fatigue and affect treatment recovery.

Magnesium sulfate is a medicine mainly used to treat serious pregnancy complications called pre-eclampsia and eclampsia, which involve high blood pressure and seizures. It works as an anticonvulsant to help prevent seizures. In cancer care, magnesium sulfate is being studied for its potential to protect against side effects from some chemotherapy drugs, especially those used for colorectal cancer.

Magnet therapy uses magnets placed on or near the body, such as magnetic pads or jewelry, with claims to help relieve pain, improve circulation, or promote healing. While some people say it helps them feel more relaxed or reduces discomfort, scientific studies have not proven clear benefits, especially for cancer care. Safety is important if you have implanted devices or need imaging tests like MRIs.

Magnetic Resonance Angiography (MRA) is a painless imaging test that uses magnets and radio waves to create detailed pictures of blood vessels and blood flow. Sometimes, a special dye is injected to make vessels easier to see. MRA helps doctors find problems like bulges, blockages, or clots in blood vessels, which can be important in cancer care when tumors affect nearby vessels.

Magnetic Resonance Cholangiopancreatography (MRCP) is a painless imaging test that uses magnets and radio waves to create detailed pictures of the liver, bile ducts, gallbladder, pancreas, and pancreatic duct. It helps doctors find problems like gallstones, inflammation, or certain cancers without using X-rays or scopes. It may also appear under related names such as MRCP.

Magnetic Resonance Imaging (MRI) is a painless test that uses magnets, radio waves, and a computer to create detailed pictures of the inside of your body. It is especially useful for looking at soft tissues like the brain, spinal cord, muscles, and organs without using radiation. Sometimes, a special dye called contrast is injected to help certain areas show up more clearly.

Magnetic Resonance Lymphangiography (MRL) is a painless imaging test that uses magnets, radio waves, and a computer to create detailed pictures of the lymphatic system. A special dye is injected to highlight lymph vessels and nodes. MRL helps doctors check for blockages, leaks, or signs of cancer spread, and it can guide treatment planning and surgery without using radiation.

Magnetic Resonance Perfusion Imaging is a special MRI scan that uses a safe injected dye to show how blood flows through tissues. It helps doctors see how well blood reaches different areas, which can be important for understanding tumors and other health conditions. It may also appear under related names such as Perfusion Magnetic Resonance Imaging.

Magnetic Resonance Spectroscopic Imaging (MRSI) is a noninvasive scan that measures chemical activity inside cells. Often done with MRI scans, it helps doctors see not just the size and shape of tumors but also how tumor cells are working. This extra information can support diagnosis, treatment planning, and monitoring in cancer care.

A magnetic-targeted carrier is a tiny bead made of iron and carbon particles that carries anticancer drugs. Doctors use an external magnet to guide these beads directly to the tumor, helping keep more of the drug at the cancer site longer. This may improve treatment effects and reduce side effects on healthy tissues. This method is still being studied and is not yet a standard cancer treatment.

Magnevist is a contrast agent used during MRI scans to help create clearer images of the brain, spine, heart, joints, and bones. Also called gadopentetate dimeglumine or Gd-DTPA, it highlights tissues to help doctors see details that might not show up well on regular MRI pictures. It is often used in cancer care to help detect tumors and guide treatment decisions.

The Maidenhair Tree, also called Ginkgo or Ginkgo biloba, is a tree native to China. Extracts from its leaves and seeds have been used in traditional medicine to support memory and blood vessel health. While studied for conditions like dementia and Alzheimer’s disease, it is not a cancer treatment. Ginkgo supplements may interact with some medications, increasing risks of bleeding or blood pressure changes, so talk with your healthcare team before use.

Mainstream medicine, also called conventional or Western medicine, is the common system where doctors and healthcare professionals diagnose and treat illnesses using drugs, surgery, or radiation. It is the usual approach for cancer care and other diseases in hospitals and clinics, based on scientific research and widely accepted medical practices.

Mainstream smoke is the tobacco smoke that a smoker breathes out. It contains nicotine and many harmful chemicals that can cause cancer and other health problems. Breathing in mainstream smoke increases the risk of lung cancer, heart disease, and lung disease. It is a common part of secondhand smoke exposure.

Maintenance therapy is treatment given after the first cancer therapy to help keep cancer from coming back. It may include medicines like drugs, vaccines, or antibodies and can be given over a long time to help control the disease and support ongoing health. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Malabsorption syndrome is when your body can’t properly absorb nutrients from food. This can cause symptoms like gas, bloating, stomach pain, and diarrhea. It may affect your nutrition and overall health, especially if you have cancer or other long-term illnesses. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Male breast cancer is a rare cancer that starts in the breast tissue of men, usually in the milk ducts. It most often affects older men and may cause lumps, nipple changes, or skin changes. Treatment usually involves surgery and may include radiation, chemotherapy, or hormone therapy. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Malignancy, also known as cancer, is a disease where abnormal cells grow uncontrollably and can invade nearby tissues. These cells may spread to other parts of the body through the blood or lymph system. Different types include carcinoma, sarcoma, leukemia, lymphoma, and cancers of the brain and spinal cord. It may also appear under related names such as Cancer.

Malignant describes cancerous cells or tumors that grow uncontrollably, invade nearby tissues, and can spread to other parts of the body. Unlike benign tumors, malignant tumors can spread and may require treatment to control or remove them. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Malignant ascites is when fluid containing cancer cells builds up in the abdomen, causing swelling and discomfort. It often happens in advanced cancer and can affect symptoms and treatment plans. Doctors may remove the fluid to relieve symptoms and learn more about the cancer’s activity. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Malignant ectomesenchymoma is a rare, fast-growing tumor that mainly affects children and young adults. It develops in the nervous system or soft tissues like muscles and connective tissue. This tumor can form in areas such as the head and neck, abdomen, perineum, scrotum, or limbs. Because it grows quickly and is uncommon, care usually involves specialists experienced with rare tumors.

Malignant fibrous cytoma is a rare cancer that usually starts in soft tissues like muscles or fat, but can also begin in bone. It most often appears in the legs, arms, or back of the abdomen. This cancer tends to grow quickly and may spread to other parts of the body, including the lungs. It mainly affects older adults and can sometimes develop in areas previously treated with radiation.

Malignant fibrous histiocytoma (MFH), also called undifferentiated pleomorphic sarcoma, is a rare cancer that usually starts in soft tissues like muscles or fat but can also form in bone. It often appears in the legs, arms, or abdomen, grows quickly, and may spread to other parts of the body such as the lungs. It mainly affects older adults and sometimes develops in areas previously treated with radiation.

Malignant meningioma is a rare, fast-growing tumor that develops in the meninges, the thin layers of tissue covering the brain and spinal cord. Unlike most meningiomas, which are usually slow-growing and noncancerous, malignant meningiomas can spread to other parts of the body and often need more careful medical treatment. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Malignant mesothelioma is a rare cancer that starts in the thin lining covering the lungs, chest, abdomen, or other organs. It is most often linked to exposure to asbestos, a harmful material once common in workplaces. Symptoms may include trouble breathing, chest or abdominal pain, and weight loss. Diagnosis usually involves imaging tests and a biopsy. Treatment options vary and can include surgery, chemotherapy, radiation, immunotherapy, and targeted therapies.

Malignant Mixed Müllerian Tumor (MMMT) is a rare cancer that contains two types of cells: carcinoma (from the lining of organs) and sarcoma (from connective tissues). It most often starts in the uterus. Because it has features of both cancer types, diagnosis and treatment can be more complex than for other cancers.

Malignant pericardial effusion is a condition where cancer causes extra fluid to build up in the thin sac around the heart. This fluid puts pressure on the heart, making it harder for it to pump blood properly. It is most often linked to cancers such as lung, breast, melanoma, lymphoma, and leukemia. This buildup can also block lymph vessels, which may increase the risk of infection.

A Malignant Peripheral Nerve Sheath Tumor (MPNST) is a rare cancer that starts in the cells covering nerves outside the brain and spinal cord. It is a type of soft tissue sarcoma, growing in tissues that support or surround other body parts. MPNST can affect nerve function and usually requires care from specialists familiar with nerve tumors.

Malignant peritoneal effusion is when cancer causes extra fluid to build up between the layers of the peritoneum, the tissue lining the abdomen and covering many abdominal organs. This fluid can cause symptoms like belly pain or swelling, trouble breathing, chest pain, weight gain, nausea, loss of appetite, and tiredness.

Malignant pleural effusion is a condition where cancer causes extra fluid to build up between the layers of tissue lining the lungs and chest wall. This fluid buildup can make breathing difficult and is most often linked to lung cancer, breast cancer, lymphoma, or leukemia. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

A malignant triton tumor is a very rare and fast-growing cancer that starts in the protective covering of nerves outside the brain and spinal cord. It contains two types of cells: Schwann cells, which support nerves, and muscle-like rhabdomyoblasts. This tumor is a type of soft tissue sarcoma and often occurs in people with a genetic condition called neurofibromatosis type 1 (NF1).

Malnourished means your body isn’t getting enough calories or important nutrients like vitamins and minerals needed for good health. This can happen if you don’t eat enough food or if your body can’t absorb nutrients properly. Being malnourished can make you feel weak and affect how your body handles illness or cancer treatment.

Malnutrition means your body isn’t getting enough calories or the right nutrients it needs to stay healthy. It can happen if you don’t eat enough, if your diet lacks important vitamins or minerals, or if your body can’t absorb nutrients well. Cancer and its treatments can cause malnutrition by affecting your appetite, digestion, or how your body uses food.

Malondialdehyde is a substance made when the body breaks down fats, especially during cell damage caused by oxidative stress. It can also be found in spoiled or old foods. In cancer care, it may be mentioned as a marker of cell damage but is not a test for cancer itself. Its levels need careful interpretation by healthcare providers.

MALT lymphoma is a type of cancer that starts in immune cells found in mucosal tissues, such as the stomach or eyes. These tissues help the body fight infections by making antibodies. MALT lymphoma is a form of non-Hodgkin lymphoma that often grows slowly and may be linked to chronic infections or inflammation in the affected area.

Mammalian target of rapamycin (mTOR) is a protein inside cells that helps control important functions like cell growth, division, and survival. It can be more active in some cancer cells than in normal cells. Certain cancer treatments work by blocking mTOR, which may help stop cancer cells from growing or cause them to die.

Mammaprint is a lab test for early-stage breast cancer that looks at the activity of 70 genes in tumor tissue. It helps predict the chance that cancer might come back or spread. The results guide doctors and patients in deciding if chemotherapy is needed to lower the risk of recurrence.

Mammary means related to the breast. In cancer care, it describes breast tissue, where breast cancer starts or where treatments focus. Understanding this term helps you recognize breast-related health information and better communicate with your healthcare team. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Mammary duct ectasia, also called breast duct ectasia, is a noncancerous condition where a milk duct under the nipple becomes wider and thicker. This can block the duct and cause fluid buildup. Many people have no symptoms, but some notice thick nipple discharge or redness and tenderness near the nipple. It most often occurs in women near or after menopause.

Mammary dysplasia, also known as benign breast disease, refers to non-cancerous changes in breast tissue. These changes may cause lumps, cysts, swelling, tenderness, skin changes, or nipple discharge. Most types do not increase breast cancer risk. Understanding this term can help you better communicate with your healthcare provider about breast changes and what to expect.

The mammary gland, also called the breast, is an organ on the chest made of connective tissue, fat, and milk-producing glands. It plays an important role in breastfeeding and is a common site where breast cancer can develop. Understanding this term helps patients learn about breast health, cancer diagnosis, and treatment options.

Mammary Paget disease is a rare type of breast cancer that affects the nipple and usually the areola, the darker skin around the nipple. Symptoms include itching, redness, flaking or crusty skin, a flattened nipple, and sometimes yellowish or bloody nipple discharge. It often occurs with other breast cancers inside the breast.

A mammogram is a special X-ray of the breast used to find early signs of breast cancer or other breast changes. It can detect cancer before symptoms appear, help diagnose breast problems when symptoms occur, and monitor breast health after treatment. The breast is gently pressed to get clear images, which a doctor reviews to look for any unusual signs.

Mammography is a low-dose x-ray test that takes detailed pictures of the breast. It helps find breast cancer early, often before symptoms appear. During the test, each breast is gently pressed between two plates to spread the tissue for clearer images taken from different angles. Mammograms are used for routine screening and to check breast changes.

MammoSite, also called balloon catheter radiation, is a type of internal radiation therapy used after breast cancer surgery. It delivers radiation directly to the area where the tumor was removed by placing a small balloon catheter in the surgical cavity. This targeted approach helps protect healthy breast tissue while treating the cancer site.

A MAMMOTOME is a special device used to take small samples of breast tissue during a biopsy. It uses a computer-guided probe to remove tissue through a tiny cut, usually without stitches. The procedure is done with local anesthesia and often on an outpatient basis, so you can go home the same day.

The mandible, or lower jaw bone, is the largest and strongest bone in the face. It forms the lower part of the jaw, holds the bottom teeth, and is the only bone in the skull that moves. It helps with chewing, talking, and other mouth movements. In cancer care, the mandible may be involved if tumors develop nearby or if treatments affect this bone.

Manipulative and body-based practices are hands-on therapies where a therapist moves or adjusts parts of the body, such as muscles or joints. Examples include chiropractic care, physical therapy, and massage. These therapies may help ease pain, reduce stress, and improve comfort during cancer care but do not treat cancer itself. They are often used alongside medical treatments to support overall well-being.

Mannitol is a medicine used to reduce swelling in the brain and support kidney function. In cancer care, it can help certain anticancer drugs reach brain tumors by temporarily opening the blood-brain barrier. Its use depends on the situation, so it’s important to understand how it applies to your care.

Mantle Cell Lymphoma is a fast-growing type of non-Hodgkin lymphoma that starts in B cells, a kind of white blood cell. It mainly affects middle-aged or older adults and can involve lymph nodes, spleen, bone marrow, blood, and the digestive system. This cancer needs careful diagnosis and treatment planning. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Mantle Field is the area of the neck, chest, and armpit lymph nodes that may be treated with radiation therapy, often for certain lymphomas. It describes the specific region targeted during radiation to help control cancer in these lymph nodes while protecting nearby healthy organs. Knowing this term can help patients understand their radiation treatment plan and what parts of the body will be involved.

Manual healing is a hands-on therapy where a trained practitioner moves or manipulates parts of the body, such as muscles or joints. It may help reduce pain, stress, anxiety, and improve overall well-being. Common examples include chiropractic care, physical therapy, and massage therapy. These therapies are often used alongside medical treatments to support comfort and quality of life during cancer care.

MAO inhibitors, also called monoamine oxidase inhibitors, are antidepressant drugs that help improve mood by preventing the breakdown of certain brain chemicals. They are sometimes used in cancer care to help manage depression or anxiety that can occur during treatment. These medications affect brain chemistry and may be part of supportive care alongside cancer treatment.

MAP, or MUTYH-Associated Polyposis, is a rare inherited condition where many small growths called polyps develop in the colon and rectum. People with MAP usually have fewer than 100 polyps, which can also appear in the stomach and small intestine. This condition increases the risk of colorectal cancer and some other cancers.

The MAP2K gene, also called the MEK gene, makes proteins that help send signals inside cells to control important functions like growth and survival. Changes in this gene can make these proteins too active in cancer cells, helping the cancer grow and spread. Some cancer treatments target these proteins to help stop cancer growth.

Mapatumumab is an experimental lab-made antibody being studied as a treatment for some cancers. It works by attaching to a protein called TRAIL R1 on certain tumor cells, which may help trigger their death. Also known as anti-TRAIL R1-mAb or HGS-ETR1, mapatumumab is not yet a standard cancer treatment and is mainly available through clinical trials.

Marcaine, also known as bupivacaine hydrochloride or Sensorcaine, is a local anesthetic medicine used to numb a specific area of the body. It helps relieve pain by blocking nerve signals and is often used during and after cancer-related surgeries to manage pain in the targeted area. It may also appear under related names such as Bupivacaine Hydrochloride, Sensorcaine.

Marfan syndrome is a genetic condition that affects connective tissue, the material that supports many parts of the body. People with Marfan syndrome are often tall and thin, with long arms, legs, fingers, and toes. It can cause heart problems, especially involving the aorta, as well as vision issues, loose joints, and changes in bones or skin.

Margenza, also called margetuximab, is a targeted medicine used with other drugs to treat adults with HER2-positive breast cancer that has spread to other parts of the body. It is given to patients who have already had at least two anti-HER2 treatments, including one for metastatic cancer. Margenza works by helping the immune system attack cancer cells with the HER2 protein.

Margetuximab (brand name Margenza) is a targeted medicine used with other drugs to treat adults with HER2-positive breast cancer that has spread to other parts of the body. It is given to patients who have already had at least two anti-HER2 treatments, including one for metastatic cancer. Margetuximab helps the immune system attack cancer cells by targeting the HER2 protein on their surface.

A margin is the edge of tissue removed during cancer surgery. If no cancer cells are found at this edge, the margin is called negative or clean, suggesting the cancer was fully removed. If cancer cells are found at the edge, the margin is positive or involved, meaning some cancer may remain.

Marginal Zone B-Cell Lymphoma (MZL) is a slow-growing type of non-Hodgkin lymphoma that starts in specific areas of lymph tissue called marginal zones. It affects B cells, a kind of white blood cell important for the immune system. MZL can develop in the spleen, lymph nodes, or other lymph tissues rich in B cells and is also known simply as marginal zone lymphoma.

Marginal zone lymphoma (MZL) is a slow-growing type of non-Hodgkin lymphoma that starts in specific areas of lymph tissue called marginal zones. It affects B cells, a kind of white blood cell, and can develop in the spleen, lymph nodes, or other lymph tissues. Because it usually grows slowly, symptoms may be mild or absent at first, and treatment plans vary based on individual needs.

Maribavir is an antiviral medicine studied to prevent cytomegalovirus (CMV) infections in cancer patients who have received donor stem cell transplants. It works by blocking viruses from making copies of themselves and spreading in the body. Maribavir is not a cancer treatment but may help protect patients with weakened immune systems during recovery.

Marijuana, also called cannabis, is the dried leaves and flowers of the Cannabis plant. It contains natural chemicals called cannabinoids that affect the brain and body. Some people with cancer use marijuana to help ease symptoms like nausea, vomiting, pain, and weight loss caused by cancer or its treatment. It may also appear under related names such as Cannabis.

Marimastat is a drug studied in cancer treatment that works by blocking enzymes called matrix metalloproteinases. These enzymes help tumors grow and spread by breaking down surrounding tissues and forming new blood vessels. Marimastat belongs to a group of drugs called angiogenesis inhibitors, which aim to slow or stop tumor growth by cutting off their blood supply.

A marker is a sign or clue that may suggest a disease like cancer is developing or present. Markers can be substances found in blood, tissue, or body fluids, or changes seen on scans or tests. They help doctors detect cancer, guide treatment, or monitor progress. Because markers mean different things depending on the cancer type and test, it’s important to discuss what a marker means for you with your care team.

MART-1 antigen, also called Melan-A protein, is a protein found on normal pigment-producing cells in the skin and eye, as well as on most melanoma cancer cells. It helps doctors identify melanoma and is being studied in vaccines that aim to boost the immune system’s ability to fight melanoma. It may also appear under related names such as Melan-A Protein, Melanoma Antigen Recognized By T Cells 1.

Martianers dermestoides is an older name for Ulomoides dermestoides, commonly called Chinese Weevils. These small beetles are sometimes used in folk medicine and alternative therapies, including for cancer. While they contain natural chemicals studied in labs, there is no proven medical benefit or safety approval for cancer treatment. Patients may hear about them in informal or alternative contexts but should discuss any use with their healthcare team.

Chinese Weevils (Ulomoides dermestoides), formerly known as Martianus dermestoides, are small beetles sometimes used in folk medicine practices where live beetles are swallowed. These practices, called coleotherapy, are promoted in some cultures for conditions like cancer or asthma. However, there is no reliable scientific evidence that swallowing these beetles is safe or effective for cancer treatment. Patients should discuss any interest in such therapies with their healthcare providers.

Masoprocol is a medication applied to the skin to treat growths caused by sun damage, such as precancerous lesions. It works as an antioxidant and may block enzymes that tumors need to grow. An oral form is being studied for prostate cancer treatment but is not yet a standard therapy. Masoprocol is also known as Actinex, NDGA, or nordihydroguaiaretic acid.

A mass is a lump or swelling in the body that can come from many causes, such as abnormal cell growth, cysts, or immune reactions. It may be benign (not cancer) or malignant (cancer). Finding a mass often leads to tests to understand what it is and how to treat it. The term itself does not mean cancer but signals the need for further evaluation.

Massage therapy, including oncology massage, uses gentle hands-on techniques like kneading and stroking to help reduce pain, stress, and stiffness. It may support relaxation and comfort during cancer care but is not a treatment for cancer itself. Always talk with your healthcare team before starting massage therapy to ensure it is safe for your situation.

Massage therapy, including oncology massage, uses gentle hands-on techniques to help reduce pain, stress, and stiffness. It is often offered alongside cancer treatment to promote relaxation and comfort. Oncology massage is specially adapted to be safe for people with cancer. While it can support well-being, it is not a treatment for cancer and should always be discussed with your healthcare team before starting.

Massively parallel sequencing, also called next-generation sequencing (NGS), is a lab method that reads the order of DNA or RNA building blocks in millions of fragments all at once. This helps doctors find gene changes that may be important for diseases like cancer and can guide treatment decisions or clinical trial options.

Mast cells are a type of white blood cell found in tissues throughout the body, especially under the skin and near blood vessels. They help the immune system respond to infections and allergies by releasing chemicals like histamine. These cells play a key role in allergic reactions and can cause symptoms such as itching, redness, or swelling.

Mast Cell Leukemia is a very rare and fast-growing cancer where immature mast cells, a type of white blood cell, build up in the bone marrow and blood. It often develops from aggressive systemic mastocytosis, a related condition. This disease is hard to treat and usually has a serious outlook.

A mast cell tumor is a lump made up of mast cells, a type of white blood cell involved in allergic reactions and immune defense. These tumors can appear on or under the skin or in muscle tissue. Sometimes called mastocytoma, they may be benign (non-cancerous) or malignant (cancerous). Understanding this term helps patients recognize symptoms and discuss diagnosis and treatment options with their care team.

Mastalgia, also called breast pain, means feeling pain or discomfort in one or both breasts. The pain can be mild or strong and may affect a small area or the entire breast, including under the arm. It often happens because of hormone changes before or during a woman’s menstrual cycle but can have other causes too. Mastalgia can affect both women and men and is rarely a sign of breast cancer.

A mastectomy is surgery to remove part or all of a breast, often to treat or reduce the risk of breast cancer. Different types remove varying amounts of breast tissue and lymph nodes. It may be combined with other treatments and can be followed by breast reconstruction or other options.

Mastitis is an inflammation of the breast tissue, usually caused by an infection. It often happens in women who are breastfeeding but can also occur after breast surgery or radiation. Symptoms include breast pain, swelling, redness, and warmth. Treatment typically involves antibiotics and ways to ease discomfort, such as warm compresses. Mastitis is not cancer but an infection that needs medical care.

A mastocytoma, also called a mast cell tumor, is a lump made up of mast cells, a type of white blood cell involved in immune responses. These growths can appear on or under the skin or in muscle tissue. Mastocytomas may be benign (non-cancerous) or malignant (cancerous), so doctors carefully evaluate them to decide on the best care.

Maternal means related to the mother or coming from the mother’s side of the family. In cancer care, it helps describe family history or genetic risks linked to your mother or maternal relatives. Understanding this term can support conversations about inherited cancer risks, genetic testing, and treatment planning. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

MATH+ COVID-19 Protocol is a treatment approach developed during the COVID-19 pandemic by the FLCCC group, including Paul Marik. In cancer care, it may be mentioned for symptom relief, nutrition support, immune help, or quality of life. It is not a standard cancer treatment and should only be considered with careful medical advice, especially during active cancer therapies or complex health conditions.

Matrix metalloproteinases (MMPs) are enzymes that break down proteins in the spaces between cells, helping tissues remodel during healing and growth. In cancer, MMPs can assist tumor cells in invading nearby tissues and spreading to other parts of the body. They need minerals like zinc or calcium to work properly.

Matted lymph nodes are groups of lymph nodes that have grown together or fused. This can happen due to infections, certain diseases like sarcoidosis or lymphoma, or cancer that has spread to the lymph nodes. Finding matted lymph nodes helps doctors understand more about a person’s health and guide treatment decisions.

Matulane, also called procarbazine hydrochloride, is a chemotherapy drug used with other medicines to treat advanced Hodgkin lymphoma. It works by damaging the DNA of cancer cells, which may help stop their growth or kill them. Matulane is usually given as part of a combination treatment and is being studied for other cancers as well.

Mature T-cell lymphoma, also called peripheral T-cell lymphoma, is a fast-growing type of non-Hodgkin lymphoma. It starts in mature T cells, which are immune cells that develop in the thymus gland and then move to other parts of the lymph system like lymph nodes, bone marrow, and spleen. It may also appear under related names such as Peripheral T-Cell Lymphoma.

A mature teratoma is a usually benign tumor made from germ cells that contain different types of tissues like hair, muscle, or bone. These tumors often appear near the tailbone in newborns or in the ovaries or testicles around puberty. While not cancer, they may cause symptoms or need surgery and follow-up care.

Max Gerson Therapy, also known as the Gerson Diet, is an alternative cancer treatment involving a strict plant-based diet, frequent vegetable juices, coffee enemas, and supplements. Developed by Max Gerson, it claims to cure cancer and other diseases but lacks scientific support and FDA approval. The therapy can be harmful, especially due to enemas and past use of raw liver extracts. Patients should discuss any diet changes with their healthcare providers.

Max Gerson Therapy, also called the Gerson Diet, is an alternative cancer treatment involving a strict plant-based diet, frequent vegetable juices, coffee enemas, and supplements. Developed by Dr. Max Gerson, it claims to cure cancer and other diseases but lacks scientific support and FDA approval. The therapy can be harmful, especially due to enemas and past use of raw liver extracts. Patients should discuss any diet changes with their healthcare providers.

Maxamine, also called histamine dihydrochloride, is a substance studied to help the immune system fight certain cancers. When used with interleukin-2, it may help immune cells find and kill cancer cells. It is a biological response modifier, meaning it can change how the immune system reacts. Maxamine is still being researched and is not a standard cancer treatment.

The maxilla, or upper jaw, is the bone that forms the upper part of your jaw, the roof of your mouth, and parts of your nose and eye sockets. It holds your upper teeth and supports muscles used for chewing and facial expressions. It is a key bone in the face and important in some medical conditions, including certain cancers.

The maxillary sinuses are two large, air-filled spaces located inside the cheekbones on each side of the nose. They are part of the paranasal sinuses, which help keep the nose moist by producing mucus. These sinuses also help lighten the skull and contribute to the sound of your voice. In cancer care, the maxillary sinuses may be mentioned when tumors or other conditions affect this area.

The Maximum Inspiratory Pressure (MIP) Test measures the strength of the muscles you use to breathe in. During this quick and painless test, you breathe through a device that records the pressure your breathing muscles create. This helps doctors understand how well these muscles are working, which can be important if cancer or its treatment affects your lungs or breathing.

Maximum Tolerated Dose (MTD) is the highest amount of a drug or treatment that can be given without causing side effects that are too severe or harmful. It is found during clinical trials by gradually increasing doses to find the safest highest dose. Knowing the MTD helps doctors balance treatment effectiveness with safety for each patient.

The Mayo Clinic Regimen is a chemotherapy treatment combining fluorouracil and leucovorin calcium. It is mainly used to treat colorectal cancer and sometimes given with radiation therapy for esophageal or stomach cancer. This drug combination is part of a tailored cancer care plan based on the patient’s specific diagnosis and health.

Maytansinoid DM4-conjugated humanized monoclonal antibody huC242 (also called huC242-DM4) is an experimental cancer treatment. It links a lab-made antibody that targets cancer cells with a toxic drug that blocks their growth. This targeted approach aims to deliver the drug directly to cancer cells, helping to limit damage to healthy cells. It is still being studied and is not yet widely available.

MBL, or Monoclonal B-Cell Lymphocytosis, is a condition where there are more identical B cells than usual in the blood. B cells are white blood cells that help the immune system. MBL is not cancer but can sometimes lead to blood cancers like chronic lymphocytic leukemia (CLL). It is often found by chance and usually requires regular monitoring rather than treatment.

Methyl-1,4-benzoquinone (MBQ) is a natural chemical found in the defensive secretions of the beetle Ulomoides dermestoides. It belongs to a group of compounds called benzoquinones. MBQ is not a cancer treatment or diagnostic tool, but understanding it can help patients recognize related terms in research or safety discussions about natural substances.

Meditation and Mindfulness-Based Stress Reduction (MBSR) are practices that help calm the mind by focusing on breathing, awareness, or repeating words. Often used alongside cancer treatment, MBSR may help reduce stress, anxiety, pain, and sleep problems, supporting overall well-being and coping during cancer care. If a record says to see Meditation / Mindfulness-Based Stress Reduction (MBSR), that preferred term should usually be checked as well. It may also appear under related names such as Meditation / Mindfulness-Based Stress Reduction (MBSR).

MC1R is a protein found in skin and eye cells that helps produce melanin, the pigment that colors skin and protects it from sun damage. Changes in the MC1R gene can increase the risk of melanoma, a serious type of skin cancer that starts in pigment-producing cells called melanocytes. It may also appear under related names such as Melanocortin 1 Receptor, Melanotropin Receptor.

MC5-A Scrambler Therapy is a non-invasive treatment for nerve pain that uses small electrodes placed on the skin. It sends gentle electrical signals to help block pain signals, often used for nerve pain caused by injury, infections, diseases, or side effects of cancer treatments. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

The McCullough Early Outpatient COVID-19 Treatment Protocol is a controversial home-based approach for treating COVID-19 early, using a combination of repurposed drugs, supplements, and symptom management. In cancer care, it may be discussed for symptom relief, nutrition support, or immune help, but it is important to talk with your healthcare team before considering it during cancer treatment.

An MCD test, or multi-cancer detection test, is a blood test being studied to screen for many types of cancer at once. It looks for pieces of DNA and other markers that cancer cells release into the blood. This test may help find cancers in parts of the body that are hard to check with exams or biopsies. It is still being researched and is not yet a standard screening tool.

MDL 101,731 is a drug that blocks an enzyme called ribonucleotide reductase, which cancer cells need to grow and divide. It belongs to a group of drugs called ribonucleotide reductase inhibitors. While it may be mentioned in cancer research or treatment plans, it is not commonly used in everyday cancer care. If you hear about MDL 101,731, ask your care team how it relates to your specific treatment.

MDR Modulator CBT-1, also called CBT-1, is a natural substance from plants being studied to help cancer treatments work better. It may help overcome drug resistance by blocking a protein cancer cells use to pump out chemotherapy drugs, potentially making treatments more effective. CBT-1 is still experimental and not yet part of standard cancer care.

MDS, or myelodysplastic syndrome, is a type of cancer where the bone marrow makes too few healthy blood cells and produces abnormal cells. This can cause symptoms like anemia, infections, or bleeding. Sometimes, MDS can develop into a more serious blood cancer called acute myeloid leukemia (AML). It may also appear under related names such as Myelodysplastic Syndrome.

MDX-010, also called ipilimumab or Yervoy, is a cancer immunotherapy drug that helps the immune system attack cancer cells. It works by blocking a protein called CTLA-4, which normally slows immune responses. MDX-010 is used alone or with other medicines to treat several cancers, including melanoma, lung, kidney, liver, esophageal, and colorectal cancers. It may cause immune-related side effects and is part of newer targeted treatment plans.

MDX-060 is a laboratory-made protein called a monoclonal antibody being studied as a treatment for some types of lymphoma, a cancer of the lymphatic system. It works by attaching to cancer cells, which may help the immune system recognize and attack them. MDX-060 is experimental and usually available only through clinical trials.

Mean is a statistical term that means the average of a group of numbers. It is found by adding all the numbers together and dividing by how many there are. In cancer care, the mean helps explain test results, treatment effects, or research findings, but it is only one way to understand data and may not show the full picture.

Mean survival is the average length of time that people with a disease like cancer live after diagnosis or starting treatment. It helps doctors understand how well a treatment might work by showing the typical survival time for a group of patients. It is an average number and does not predict exactly how long any one person will live.

The measles virus is the germ that causes measles, a very contagious illness. It mainly affects children and causes symptoms like fever, cough, and a red rash. The virus spreads easily through coughing or contact with fluids from the nose or mouth of someone who is infected. Understanding this virus is important during cancer care because treatments can weaken the immune system, increasing infection risks.

Measurable disease means a tumor or cancer growth that can be clearly measured in size using imaging tests like CT scans or MRIs. This helps doctors track how the cancer responds to treatment over time. The term often appears in medical reports and clinical trials to describe tumors that are large and well-defined enough to measure accurately.

Measurable residual disease (MRD), also called minimal residual disease, means a very small number of cancer cells that remain in the body during or after treatment. These cells are too few to be seen with regular tests but can be found using very sensitive lab methods. MRD testing is mainly used for blood cancers like leukemia and lymphoma to help doctors understand treatment response and the chance of cancer returning.

Mebendazole is a medicine originally used to treat infections caused by parasitic worms. It works by blocking the parasites’ ability to absorb sugar, which leads to their death. Recently, researchers have studied mebendazole for possible effects against some types of cancer. While generally safe, it can cause side effects, especially if used for a long time or at high doses. It is not a standard cancer treatment and should only be used under medical supervision.

Mechanism of action (MOA) explains how a medicine or treatment works inside the body. It describes the specific way a drug affects cells, such as blocking a protein or slowing cancer cell growth. Understanding MOA helps doctors choose the right treatments, predict side effects, and know which patients might benefit most.

Mechanistic Target Of Rapamycin (mTOR) is a protein inside cells that helps control important functions like cell growth, division, and survival. It can be more active in some cancer cells than in normal cells. Some cancer treatments work by blocking mTOR, which may help stop cancer cells from growing or cause them to die.

Mechlorethamine hydrochloride is a medicine applied to the skin to treat early-stage mycosis fungoides, a type of skin lymphoma. It works by damaging cancer cells’ DNA to help stop their growth. Also known as Mustine or Valchlor, it is usually used after other skin treatments and is being studied for other cancers.

Med Bed Technology, also called MedBeds, refers to device-based or frequency-oriented treatments discussed mainly in alternative cancer circles. These devices claim to help with pain, energy, inflammation, immune support, detoxification, or even direct anticancer effects. However, there is no proven evidence for these claims, and using Med Beds instead of standard cancer care can delay important treatments like surgery or chemotherapy.

Med Bed Technology, also called MedBeds, refers to devices or treatments promoted mainly in alternative health circles. These claim to relieve pain, boost energy, reduce inflammation, support immunity, or even fight cancer. However, there is no credible medical evidence supporting these claims. Using Med Beds instead of proven cancer treatments can delay important care and pose serious risks.

Med Bed Technology, often called MedBeds, refers to devices or treatments promoted mainly in alternative health circles that claim to relieve pain, boost energy, reduce inflammation, support immunity, or fight cancer. However, there is no credible medical evidence supporting these claims. Using Med Beds instead of proven cancer treatments can delay important care and pose serious risks. Always discuss such options with your cancer care team.

MEDI-507, also called siplizumab, is an experimental medicine studied for certain T-cell lymphomas and to help prevent organ or tissue rejection after kidney or bone marrow transplants. It works by attaching to a protein called CD2 on some immune and cancer cells, which may help control the immune system and target cancer cells.

MEDI-522, also known as Abegrin or etaracizumab, is an experimental medicine being studied to treat some cancers. It is a lab-made protein that attaches to blood vessels in tumors and may help stop new blood vessels from forming. This could slow tumor growth and help prevent cancer from spreading. MEDI-522 is not yet a standard treatment and is usually available only through clinical trials.

The medial supraclavicular lymph node is a small, bean-shaped lymph node located just above the collarbone, between the center of the chest and a line from the nipple to the shoulder. It is part of the lymphatic system, which helps fight infections and can be important in cancer care to check if cancer has spread.

Median is a statistics term that means the middle value in a set of numbers. In cancer care, it helps describe typical results, like the middle survival time or middle age of patients in a study. Understanding median can help you better interpret medical information and treatment outcomes. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Median overall survival is the length of time from diagnosis or the start of treatment when half of a patients in a group with a disease like cancer are still alive. It helps doctors and patients understand how well a treatment might work by showing the typical survival time for patients in a study or group.

Median survival is the length of time from diagnosis or the start of treatment when half of a group of patients with a disease like cancer are still alive. It helps doctors and patients understand how well a treatment might work and is often used in clinical trials to measure effectiveness. It is also called median overall survival.

The median umbilical ligament, also called the urachus, is a thin, fibrous cord that connects the top of the bladder to the belly button. It is a leftover structure from before birth that remains in the body but usually has no function. Knowing about it can help explain some medical findings near the bladder or abdomen.

The mediastinal pleura is a thin membrane that lines the chest cavity between the lungs. It helps protect the lungs and separates them from important organs like the heart and major blood vessels. This term often comes up in lung or chest cancer care to describe where a tumor is located or if it has spread nearby.

A mediastinoscope is a thin, tube-like instrument doctors use to look at tissues and lymph nodes between the lungs. It has a light and camera lens to see inside the chest and can take small tissue samples. Inserted through a small cut above the breastbone, it helps check important areas like the heart, large blood vessels, windpipe, and food pipe.

Mediastinoscopy is a procedure where doctors use a thin, lighted tube called a mediastinoscope to look at the area between the lungs and nearby lymph nodes. It helps examine organs and take small tissue samples through a small cut above the breastbone. This is often done to check for diseases like cancer in the chest.

The mediastinum is the central space in the chest between the lungs. It contains important organs like the heart, large blood vessels, windpipe (trachea), esophagus, thymus gland, and lymph nodes. This area is important in cancer care because tumors or other problems can develop there, potentially affecting breathing, circulation, or swallowing.

Medicaid is a government health insurance program that helps people and families with low incomes pay for medical care. It covers many groups, including children, pregnant women, older adults, and people with disabilities. Medicaid is run by each state following federal rules, so coverage and eligibility can vary depending on where you live.

Medical castration is a treatment using medicines to lower or stop hormone production from the ovaries or testicles. This helps reduce hormones like estrogen or testosterone that can encourage some cancers to grow. It is a non-surgical way to control hormone levels and is often part of hormone therapy for cancers such as prostate or breast cancer.

A medical device is any tool, machine, implant, or test kit used in healthcare to help prevent, find, or treat diseases. In cancer care, devices like imaging machines, implants, or diagnostic kits support your treatment and monitoring. They are important parts of your care but are not treatments or drugs themselves.

Medical history is a record of your past and current health information, including illnesses, surgeries, allergies, medications, and lifestyle habits. It also includes health details about your close family members. This information helps your healthcare team understand your health risks and plan your care. It may also appear under related names such as Health History.

Medical Nutrition Therapy is a personalized nutrition plan designed to help manage health conditions like cancer, diabetes, or heart disease. It involves assessing your nutrition needs and creating a care plan that may include diet changes, counseling, or special feeding methods to support your health during treatment. It may also appear under related names such as Nutrition Therapy.

A medical oncologist is a doctor specially trained to treat adult cancers using medicines like chemotherapy, hormone therapy, targeted therapy, and biological therapy. They often coordinate your overall cancer care, manage treatments, and help with symptoms and side effects during and after therapy. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Medical Ozone Therapy is an alternative treatment discussed in cancer care for its potential effects on the immune system, inflammation, metabolism, and symptom relief. It involves using a controlled mixture of ozone and oxygen delivered in various ways, such as treated blood reinfusion or topical applications. While some promote it as supportive care, evidence is limited, and it is not an approved cancer treatment. Patients should consult their healthcare team before considering this therapy.

A Medical Power of Attorney is a legal document that lets you choose someone you trust to make medical decisions for you if you cannot speak for yourself. This person, often a family member, friend, or lawyer, understands your values and wishes about your health care and can help guide your treatment during serious illness or emergencies.

Medical Thermography Screening is a noninvasive imaging method some clinics use to detect heat patterns, inflammation, or blood vessel changes, often related to breast health. It is sometimes discussed in cancer care for prevention, treatment support, or symptom relief. However, it is not a substitute for standard cancer tests like mammograms or biopsies and should be considered carefully with your healthcare team.

Medicare is a U.S. government health insurance program mainly for people 65 and older, and some younger people with certain disabilities. It helps cover hospital stays, doctor visits, and some prescription drugs. While Medicare pays for many health care costs, people usually still pay part of their expenses through premiums, deductibles, or copayments.

Medicare Part D, also called Medicare Prescription Drug Coverage, is insurance that helps people with Medicare pay for prescription medicines. It requires an extra monthly premium and covers part of drug costs like deductibles and copayments. Offered by private companies approved by Medicare, it acts as supplemental insurance to help manage medication expenses, including those related to cancer treatment.

Medicare Prescription Drug Coverage, also called Medicare Part D, is a type of insurance that helps people with Medicare pay for prescription medicines. It requires paying an extra monthly premium and some costs like deductibles and copayments. This coverage is offered by private insurance companies approved by Medicare and acts as supplemental insurance to help manage medication expenses.

The Medicated Urethral System for Erection (MUSE) is a treatment for erectile dysfunction. It uses a small pellet containing alprostadil, inserted into the urethra at the tip of the penis. This medicine helps increase blood flow to the penis, causing an erection. MUSE offers a needle-free option for men who have trouble achieving or maintaining an erection, including those affected by cancer treatments.

A medication is a substance used to prevent, diagnose, treat, or relieve symptoms of diseases. Medications come in many forms, such as pills, liquids, creams, or patches, and can be taken by mouth, injected, or applied to the skin or eyes. They contain active ingredients that affect the body and inactive ingredients that help deliver the medicine safely.

Medicinal mushrooms like Reishi and Turkey Tail are natural fungi used by some people during cancer care to support the immune system and overall health. They contain active compounds that may help with symptoms such as inflammation, nausea, appetite, and relaxation. While popular as complementary supplements, medicinal mushrooms are not a replacement for standard cancer treatments like chemotherapy or surgery.

Medicine includes the drugs, treatments, and procedures used to prevent, treat, or ease symptoms of diseases. In cancer care, medicine covers therapies that fight cancer cells and medicines that help manage side effects and symptoms, supporting patients’ comfort and health. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Meditation, including Mindfulness-Based Stress Reduction (MBSR), is a practice that helps you focus your attention on your breathing, a word, or an object to reduce stress and distracting thoughts. It can promote relaxation and may help ease symptoms like anxiety, pain, or depression, especially during cancer and its treatment. Meditation is a supportive approach used alongside medical care to improve overall well-being.

Meditation and Mindfulness-Based Stress Reduction (MBSR) are practices that help calm the mind by focusing on breathing, awareness, or repeating words. Often used alongside cancer treatment, these techniques may help reduce stress, anxiety, pain, and sleep problems, supporting overall well-being and coping during cancer care. If a record says to see Meditation / Mindfulness-Based Stress Reduction (MBSR), that preferred term should usually be checked as well. It may also appear under related names such as Meditation / Mindfulness-Based Stress Reduction.

Meditation and Mindfulness-Based Stress Reduction (MBSR) are practices that help calm the mind by focusing on breathing, awareness, or repeating words. Often used alongside cancer treatment, these techniques may help reduce stress, anxiety, pain, and sleep problems, supporting overall well-being and coping during cancer care. It may also appear under related names such as Meditation, Mindfulness-Based Stress Reduction (MBSR), MBSR, Meditation / Mindfulness-Based Stress Reduction.

The Mediterranean Diet is a healthy way of eating that focuses on whole, minimally processed foods like fruits, vegetables, whole grains, legumes, nuts, fish, and healthy fats such as olive oil. It supports overall health and is often recommended alongside cancer care to help improve nutrition and well-being. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Medroxyprogesterone acetate is a man-made form of the hormone progesterone. It is used to help prevent cancer of the uterus lining, treat menstrual problems, and as a hormonal birth control. It works by mimicking natural hormones to balance the body’s cycle and protect the uterus. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Medullary breast carcinoma is a rare type of breast cancer marked by immune cells called lymphocytes surrounding and inside the tumor. This immune response often means the cancer may respond well to treatment. It differs from more common breast cancers in how it looks under a microscope and may have a better outlook, but each case is unique.

Medullary thyroid cancer is a rare type of thyroid cancer that starts in the C cells of the thyroid gland. These cells produce calcitonin, a hormone that helps control calcium levels in the blood. This cancer can be linked to inherited genetic conditions and may require special testing and treatment approaches.

Medulloblastoma is a fast-growing cancer that starts in the cerebellum, the lower back part of the brain. It most often affects children and young adults. This tumor can spread through the fluid around the brain and spinal cord, sometimes reaching other brain areas or the spinal cord. Spread to other parts of the body is rare.

A Mega-Voltage Linear Accelerator, often called a linac, is a machine used in radiation therapy to treat cancer. It uses electricity to speed up tiny particles, creating high-energy X-rays or electrons that target tumors. This helps doctors deliver radiation precisely to cancer cells while protecting nearby healthy tissue. It may also appear under related names such as Linac, Linear Accelerator, And Mev Linear Accelerator.

High-Dose Vitamins, also called Megavitamin Therapy, means taking vitamins in amounts much larger than usual. In cancer care, people may use these vitamins to support nutrition, ease symptoms, improve recovery, or boost the immune system. It’s important to talk with your healthcare team before starting, as high doses can affect cancer treatments and overall health.

Megestrol acetate is a hormone therapy drug taken as a tablet to help relieve symptoms of advanced breast and endometrial cancers. It works by lowering estrogen effects, which may slow cancer growth. It is a synthetic form of the hormone progesterone and is also being studied for other cancer types and conditions.

Meiosis is a special type of cell division that happens only when egg and sperm cells form. It reduces the amount of DNA in these cells by half, which is important for reproduction and passing genetic information from parents to children. Meiosis helps create genetic diversity and is linked to inherited cancer risks, but it is not involved in how cancer cells grow.

The MEK gene, also called the MAP2K gene, makes proteins that help cells send signals controlling growth and survival. Changes in this gene can make these proteins too active, which may help cancer cells grow and spread. Some cancer treatments target these altered MEK proteins to help control the disease.

A MEK inhibitor is a targeted cancer medicine that blocks proteins called MEK1 and MEK2. These proteins help control cell growth and survival. By blocking them, MEK inhibitors can slow or stop cancer cells from growing and may help kill them. Some MEK inhibitors are approved to treat certain cancers or tumors that cannot be removed by surgery.

MEK Inhibitor AZD6244, also called selumetinib sulfate or Koselugo, is a medicine used to treat children aged 2 and older with neurofibromatosis type 1 (NF1). It helps shrink plexiform neurofibromas—tumors on nerves that cause symptoms and cannot be removed by surgery. This drug works by blocking proteins that help these tumors grow and is also being studied for some cancers.

MEK1 protein is a natural protein inside cells that helps control cell growth, development, and death. In some cancers, changes in the gene for MEK1 or related genes can make it overactive, leading to faster cancer cell growth. Some cancer treatments work by blocking MEK1 to slow down tumor growth.

MEK2 protein is a natural protein inside cells that helps control how cells grow, develop, and die. In some cancers, changes in the MEK2 gene or related genes can make this protein too active, which may speed up cancer growth. Some cancer treatments work by blocking MEK2 to help slow down cancer cell growth.

Mekinist (also called trametinib dimethyl sulfoxide) is a targeted cancer drug used alone or with dabrafenib to treat tumors with a specific BRAF gene mutation. It is approved for certain brain tumors in children, thyroid cancer, melanoma, lung cancer, and other solid tumors. Mekinist works by blocking proteins that help cancer cells grow.

Mektovi (binimetinib) is a targeted cancer medicine used with encorafenib to treat melanoma that has spread or cannot be removed by surgery. It works by blocking proteins called MEK1 and MEK2, which help cancer cells grow. Mektovi is used when the melanoma has a specific change in the BRAF gene and is also being studied for other cancers.

Melan-A protein, also called MART-1 antigen, is found on normal pigment-producing cells in the skin and eye, as well as on most melanoma cancer cells. It helps doctors identify melanoma and is being studied in vaccines that aim to boost the immune system’s ability to fight melanoma. It may also appear under related names such as MART-1 Antigen, Melanoma Antigen Recognized By T Cells 1.

Melanin is the natural pigment that gives color to your skin, hair, and eyes. It also helps protect your skin from damage caused by ultraviolet (UV) light from the sun or tanning beds. Understanding melanin is important for learning about skin health and the risks of UV exposure, including skin cancer.

Melanocortin 1 receptor (MC1R) is a protein found in skin and eye cells that produce melanin, the pigment that colors skin and helps protect it from sun damage. Changes in the MC1R gene can increase the risk of melanoma, a serious type of skin cancer that starts in pigment-producing cells called melanocytes.

Melanocytes are special cells in the skin and eyes that produce melanin, the pigment giving color to your skin, hair, and eyes. These cells can group together to form moles, which are common and usually harmless. Changes in melanocytes can sometimes lead to skin conditions, including melanoma, a type of skin cancer. Monitoring moles and skin changes helps protect your skin health.

Melanoma is a type of cancer that starts in melanocytes, the cells that give skin its color. It often begins in a mole but can also develop in other pigmented areas like the eye or intestines. Although less common than other skin cancers, melanoma is more likely to spread and cause serious health problems if not found and treated early.

Melanoma and Neural System Tumor Syndrome is a very rare inherited condition that raises the chance of developing melanoma, a serious skin cancer, and tumors in the nervous system, especially astrocytoma, a type of brain tumor. These tumors often appear early in life and may occur together or separately in the same person.

Melanoma Antigen Recognized By T Cells 1 (also called MART-1 or Melan-A) is a protein found on normal pigment-producing cells in the skin and eye, as well as on most melanoma cancer cells. Researchers are studying vaccines made from parts of this protein to help the immune system better recognize and attack melanoma cells.

Melanoma in situ, also called stage 0 melanoma, is the earliest form of skin cancer. It means abnormal pigment-producing cells are found only in the top layer of the skin and have not spread deeper or to other tissues. Early detection and treatment usually lead to very good outcomes. It may also appear under related names such as Stage 0 Melanoma.

A melanoma vaccine is a treatment made from human melanoma cancer cells. It aims to help the immune system recognize and attack melanoma, a serious skin cancer. This vaccine may be used alone or with other treatments and is mainly offered through research studies or clinical trials rather than as a standard therapy.

Melanoma-Astrocytoma Syndrome is a very rare inherited condition that raises the chance of developing melanoma, a serious skin cancer, and astrocytoma, a type of brain tumor. It is caused by changes in the CDKN2A gene. Tumors may appear early in life and can occur together or separately. Family members may also carry the gene mutation and have increased cancer risk.

The melanotropin receptor, also called MC1R, is a protein in skin and eye cells that helps produce melanin, the pigment that colors skin and protects it from sun damage. Changes in the MC1R gene can increase the risk of melanoma, a serious skin cancer that starts in pigment-producing cells called melanocytes.

Melatonin is a natural hormone made by the pineal gland in the brain that helps control the body’s sleep-wake cycle. It also acts as an antioxidant, protecting cells from damage. Melatonin is available as a laboratory-made supplement and may be discussed in cancer care for sleep problems, fatigue, or overall health. Always talk with your healthcare provider before using melatonin supplements.

Melphalan, also known as Alkeran Tablets, is a chemotherapy drug used mainly to treat multiple myeloma and certain ovarian cancers that cannot be removed by surgery. It works by damaging the DNA inside cancer cells to stop their growth and division. Melphalan can be taken as a pill or given by injection, depending on the treatment plan. It is also being studied for other types of cancer.

Melphalan hydrochloride is a chemotherapy drug used to treat certain cancers, including multiple myeloma and uveal melanoma (a type of eye cancer). It can be given as an infusion or injection, especially for patients who cannot take the drug by mouth. Some forms prepare patients for stem cell transplants or target liver tumors that cannot be removed by surgery.

Memantine hydrochloride, also called Namenda, is a medicine used to treat dementia symptoms caused by Alzheimer’s disease. It works by calming overactive brain cells. Researchers are also studying memantine to help protect the brain and reduce memory or thinking problems after whole-brain radiation therapy in cancer patients. It may also appear under related names such as Namenda.

A membrane is a very thin layer of tissue that covers or lines surfaces inside the body. Membranes can protect organs, line body cavities, or cover cells. They often act as barriers and play a role in how diseases like cancer develop or spread. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

MEN syndrome, or multiple endocrine neoplasia syndrome, is an inherited condition that can cause tumors or cancers in hormone-producing glands. There are different types of MEN syndrome, each linked to specific gene changes found by blood tests. People with MEN syndrome may develop various endocrine tumors depending on the type they have.

MEN-10755 is an anticancer drug in the antitumor antibiotic family. It works by interfering with cancer cell growth and may be used in treating certain cancers, such as small cell lung cancer. Patients might hear about it in treatment plans or clinical trials, but its role depends on the specific cancer and care setting.

MEN1 Syndrome is a rare inherited condition that causes mostly noncancerous tumors in hormone-producing glands like the parathyroid, pituitary, and pancreas. These tumors can lead to high hormone levels, causing problems such as kidney stones, fertility issues, and ulcers. Some pancreatic tumors may become cancerous, so ongoing monitoring and care are important.

MEN2 is a rare inherited condition that affects hormone-producing glands, causing tumors in the thyroid, parathyroid, and adrenal glands. These tumors can lead to high hormone levels, which may cause problems like high blood pressure and kidney stones. MEN2 increases the risk of certain cancers, including medullary thyroid cancer and adrenal gland tumors.

MEN2 Syndrome is a rare inherited condition that affects hormone-producing glands, including the thyroid, parathyroid, and adrenal glands. It can cause tumors that may produce too much hormone, leading to health problems like high blood pressure and kidney stones. MEN2 also increases the risk of certain cancers, such as medullary thyroid cancer and adrenal gland tumors.

MEN2A is a rare inherited condition affecting hormone-producing glands. It raises the risk of medullary thyroid cancer, adrenal gland tumors called pheochromocytomas, and parathyroid gland problems. These glands may produce too many hormones, causing symptoms like high blood pressure or kidney stones. MEN2A is caused by a change in the RET gene and is also known as Sipple syndrome.

MEN2A Syndrome is a rare inherited condition that affects hormone-producing glands. It increases the risk of medullary thyroid cancer, tumors in the adrenal and parathyroid glands, and hormone imbalances that can cause symptoms like high blood pressure. MEN2A is caused by a change in the RET gene and may also cause noncancerous tumors and skin symptoms.

MEN2B is a rare inherited condition affecting hormone-producing glands. It raises the risk of medullary thyroid cancer, adrenal gland tumors, and sometimes parathyroid gland cancer. People with MEN2B may also develop noncancerous growths around nerves in the mouth, lips, tongue, and eyelids, along with digestive and bone-related symptoms. It may also appear under related names such as MEN2B Syndrome, Multiple Endocrine Adenomatosis Type 2B, And Multiple Endocrine Neoplasia Type 2B Syndrome.

MEN2B Syndrome is a rare inherited condition that affects hormone-producing glands. It increases the risk of medullary thyroid cancer, tumors in the adrenal glands, and sometimes parathyroid gland cancer. It can also cause noncancerous growths around nerves in the mouth, lips, tongue, and eyelids, along with digestive and bone-related symptoms. MEN2B is caused by a change in the RET gene and requires careful monitoring and genetic testing for affected families.

Ménétrier disease is a rare stomach condition where the inner lining becomes thick and develops large folds due to cell overgrowth. It can cause symptoms like vomiting, diarrhea, and weight loss. People with this disease may have a higher risk of stomach cancer, so doctors usually monitor it carefully. It is also called gastric mucosal hypertrophy or giant hypertrophic gastritis.

A menin inhibitor is a targeted cancer medicine that blocks a protein called menin from attaching to another protein, MLL. This helps stop certain leukemia cells from growing. Menin inhibitors are a newer type of treatment being studied and used for some types of leukemia. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Meningeal refers to anything related to the meninges, which are three thin layers of tissue that cover and protect the brain and spinal cord. This term is often used in medical settings to describe conditions, tests, or treatments involving these protective layers around the central nervous system. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Meningeal carcinomatosis is a serious condition where cancer cells spread from the original tumor to the meninges, the thin layers of tissue that cover and protect the brain and spinal cord. This can cause inflammation and increased pressure in the brain. It most often occurs in cancers like breast cancer, lung cancer, or melanoma and may lead to neurological symptoms such as headaches, confusion, or weakness.

Meningeal leukemia, also called leukemic leptomeningitis or leukemic meningitis, happens when leukemia cells spread to the meninges—the thin layers of tissue covering the brain and spinal cord. This can cause inflammation and affect the nervous system. If you see this term in medical notes, ask your care team what it means for your specific situation rather than assuming it is a diagnosis or treatment plan.

Meningeal metastasis is a serious condition where cancer cells spread from the original tumor to the meninges—the thin layers of tissue that cover and protect the brain and spinal cord. This can cause inflammation and increased pressure in the brain. It most often occurs in cancers like breast cancer, lung cancer, or melanoma and may cause symptoms such as headaches, weakness, or confusion.

Meningeal syndrome is a condition where the thin layers covering the brain and spinal cord become irritated. This can cause symptoms like headache, fever, and a stiff neck. It may happen when blood, cancer cells, or substances from cancer cells enter the fluid around the brain and spinal cord, or from infections. If you see this term, ask your care team how it relates to your situation.

The meninges are three thin layers of tissue that cover and protect the brain and spinal cord. They help cushion the central nervous system and keep it safe. Understanding the meninges can help patients and caregivers recognize why certain symptoms or tests related to the brain and nerves might happen during cancer care.

A meningioma is a slow-growing tumor that forms in the meninges, the thin layers of tissue covering the brain and spinal cord. Most meningiomas occur in adults and often grow slowly. They may cause symptoms if they press on nearby brain or spinal cord tissue. Understanding meningioma helps patients and caregivers discuss diagnosis and treatment options with their care team.

Meningitis is inflammation of the meninges, the thin layers of tissue that cover and protect the brain and spinal cord. It can be caused by infections like viruses or bacteria, and sometimes by cancer spreading to these tissues. Symptoms may include fever, headache, and neck stiffness. Understanding meningitis helps patients and caregivers recognize why certain tests or treatments are needed and when to seek medical care.

Meningococcal disease is a serious infection caused by bacteria called Neisseria meningitidis. It can affect the brain’s lining or the bloodstream and spreads through close contact with saliva or respiratory fluids. Symptoms develop quickly and include fever, headache, stiff neck, and a dark purple rash. Immediate medical care and antibiotics are essential. Vaccination helps prevent this disease.

The meningococcal vaccine helps protect against serious infections caused by Neisseria meningitidis bacteria. These infections can affect the brain and blood and may be life-threatening. People receiving the medicine eculizumab, which increases infection risk, are advised to get this vaccine at least two weeks before starting treatment, or as soon as possible if treatment cannot be delayed.

Menopausal Hormone Therapy (MHT) is treatment that replaces hormones like estrogen and progesterone that decrease during and after menopause. It helps relieve symptoms such as hot flashes, night sweats, vaginal dryness, and bone thinning. MHT can be given as pills, patches, creams, or gels. While it can improve quality of life, it also carries some risks, so discussing benefits and risks with your healthcare provider is important.

Menopause is the natural time in a woman’s life when her ovaries stop making hormones and menstrual periods end, usually around age 50. It can cause symptoms like hot flashes, night sweats, mood changes, and vaginal dryness. Menopause also affects bone strength and heart health. Treatments are available for symptoms, but not everyone needs them.

Menorrhagia means having very heavy menstrual bleeding. It is a common type of abnormal uterine bleeding where periods last longer than usual or involve much more blood loss. This can affect daily life and may sometimes be linked to other health issues. Treatments vary depending on the cause and severity, and many women can be treated without extensive tests.

Menses, also called menstruation or a menstrual period, is the regular monthly shedding of blood and tissue from the uterus through the vagina. It usually starts during puberty and continues until menopause. Many women experience symptoms like cramps, heavy bleeding, or pain during their periods. Understanding menses helps track reproductive health and recognize changes that may need medical attention.

The menstrual cycle is the natural monthly process in which the body prepares for pregnancy by thickening the lining of the uterus. It usually lasts about 28 days but can vary. Hormone changes during the cycle can cause symptoms like tender breasts and tiredness. Understanding the menstrual cycle helps patients and caregivers discuss symptoms and treatments with their care team in the right context.

A menstrual period, also called menses or menstruation, is the monthly shedding of blood and tissue from the uterus when pregnancy does not occur. It usually happens about every 28 days and lasts 3 to 5 days, but this can vary. Many women experience symptoms like painful or heavy periods. Changes in menstrual bleeding can be linked to health conditions or cancer treatments.

Menstruation, also called a period or menses, is the monthly shedding of blood and tissue from the uterus through the vagina. It usually starts during puberty and continues until menopause, often between ages 45 and 55. Common symptoms include vaginal bleeding, cramps, bloating, mood changes, and breast tenderness. Many women use pads, tampons, or menstrual cups to manage bleeding during their period.

Mental health refers to your emotional, psychological, and social well-being. It affects how you think, feel, and handle everyday life, including stress and relationships. Good mental health helps you cope with challenges and enjoy life. Mental health concerns, such as depression or anxiety, are common and can affect anyone, including people with cancer. Support and treatment are available to help manage these conditions.

Psycho-Oncology, also called Mental Health Counseling, supports the emotional, mental, and relational needs of people affected by cancer or serious illness. It helps patients and families cope with feelings like anxiety, depression, and stress, and improves overall well-being during diagnosis, treatment, and beyond. The term may appear under different names, so it’s helpful to ask your care team what it means for you.

A mental health counselor, also called a counselor, is a trained professional who talks with patients and their families about emotional and personal challenges. They help people cope with feelings, improve relationships, and make decisions. In cancer care, counselors support mental and emotional well-being alongside medical treatment, helping patients and caregivers manage stress and difficult emotions.

Menthol is a substance found naturally in mint oils or made in labs. It creates a cooling feeling when inhaled, eaten, or applied to the skin. Menthol is used in products like cough drops, nasal sprays, and creams to relieve minor throat irritation and itching. It also has antibacterial effects in dental care. If you see the word menthol in your care, ask your healthcare team how it relates to your situation.

MEPACT, also known as mifamurtide or L-MTP-PE, is a drug that helps activate the immune system to fight certain bone cancers, especially osteosarcoma in children and young adults. It works by stimulating white blood cells to attack cancer cells and is usually given after surgery and chemotherapy. Patients may see different names for this drug, so it’s important to ask your care team how it applies to your treatment.

Meperidine hydrochloride, also known as Demerol, is a synthetic opioid medication used to relieve moderate to severe pain. It works by attaching to opioid receptors in the brain and spinal cord, helping to block pain signals. Patients may see either name in medical notes or treatment plans, so it’s important to ask your care team how it relates to your specific situation.

Mercaptopurine, also known by brand names Purinethol and Purixan, is a medication used mainly to treat a type of blood cancer called acute lymphoblastic leukemia (ALL). It works by slowing or stopping the growth of cancer cells. Mercaptopurine may also be used for some autoimmune diseases and is being studied for other cancers. Patients should always discuss how this drug applies to their care with their healthcare team.

Mercury is a silver-white, poisonous metal that is liquid at room temperature. It is found in some products and the environment. In cancer care, mercury may be discussed in relation to testing for heavy metals in food or supplements, concerns about exposure, or supportive care. Patients should talk with their healthcare team about any mercury-related tests or treatments to understand what it means for their care.

Mercy killing, also called euthanasia, means intentionally ending a person’s life to relieve suffering from an incurable or painful illness. In cancer care, it is important to understand this term carefully and ask your care team how it applies to your situation. It is different from treatments like palliative sedation, which aim to ease symptoms without causing death.

In cancer care, the term "meridian" comes from traditional Chinese medicine and refers to pathways through which vital energy, called qi, flows. These meridians are important in therapies like acupuncture, which some patients use alongside standard treatments to help manage symptoms such as pain or nausea. Meridian theory is not part of conventional cancer diagnosis or treatment but may be discussed when exploring complementary symptom relief options.

Merkel cells are special cells found just below the top layer of the skin, near nerve endings that help sense touch. When these cells grow uncontrollably, they can form a rare and aggressive skin cancer called Merkel cell carcinoma. This cancer often appears as a fast-growing, painless lump on sun-exposed skin. Understanding this term helps patients and caregivers discuss diagnosis, staging, and treatment options with their care team.

Merkel Cell Cancer, also called Merkel cell carcinoma or neuroendocrine carcinoma of the skin, is a rare and aggressive skin cancer. It usually appears as a fast-growing, painless lump on sun-exposed areas like the head, neck, arms, or legs. It most often affects older adults and people with weakened immune systems. Early diagnosis and treatment are important because it can spread quickly.

Merkel cell carcinoma is a rare and aggressive skin cancer that usually appears as a fast-growing, painless lump on sun-exposed areas like the head, neck, arms, or legs. It often affects older adults and people with weakened immune systems. Also called Merkel cell cancer, neuroendocrine carcinoma of the skin, or trabecular cancer, it can spread quickly and requires prompt medical attention.

Mesenchymal refers to a type of cells that develop into connective tissues, blood vessels, and lymphatic tissues in the body. In cancer care, the term often appears as part of names for certain tumors or treatments. It’s important to understand mesenchymal in context and ask your healthcare team how it relates to your specific diagnosis or treatment plan.

The mesenteric membrane is a thin layer of tissue inside the abdomen that connects the intestines to the back wall of the belly. It helps hold the intestines in place and contains blood vessels, nerves, and lymph nodes. Understanding this membrane is important in some cancers that affect the abdomen, as it can be involved in how the disease spreads or is treated.

Mesna (also called Mesnex) is a medicine used during certain chemotherapy treatments to help protect the bladder from bleeding and irritation. It is given to people receiving cancer drugs like ifosfamide or cyclophosphamide, which can cause bladder problems. Mesna helps reduce these side effects but is not a cancer treatment itself. If you see this term, ask your care team how it relates to your treatment.

Mesnex, also known as mesna, is a medicine used during certain chemotherapy treatments to protect the bladder from bleeding and irritation. It is given to people receiving cancer drugs like ifosfamide or cyclophosphamide, which can cause bladder problems. Mesnex helps reduce these side effects but is not a cancer treatment itself. If you see this term, ask your care team how it relates to your treatment.

Mesothelin is a protein found on the surface of some normal and cancer cells, including mesothelioma and ovarian cancer. Testing a tumor for mesothelin can help doctors decide if certain experimental treatments, like targeted antibodies, might be options in clinical trials. Patients should ask their care team how mesothelin testing relates to their specific diagnosis and treatment plan.

Mesothelioma is a rare cancer that affects the thin lining covering the lungs, chest, abdomen, or other organs. It is most often linked to exposure to asbestos, a harmful mineral once common in workplaces. Symptoms may include breathing trouble, cough, chest or abdominal pain, and unexplained weight loss. Diagnosis usually involves exams, imaging, and biopsy. Treatment options include surgery, chemotherapy, radiation, and newer therapies, but mesothelioma is often found at an advanced stage.

Messenger RNA (mRNA) is a type of RNA found in cells that carries genetic instructions from DNA to help make proteins. It acts as a messenger, delivering the information needed for protein production. mRNA may also appear as Mrna in reports. Small molecules called microRNAs (miRNAs) can attach to mRNA and block protein production. Researchers are studying mRNA and miRNA to improve cancer diagnosis and treatment.

The MET gene makes a protein that helps cells grow and survive. Changes (mutations) in this gene can cause some cancers to grow and spread. Testing for MET mutations can help doctors choose treatments, like the drug capmatinib (Tabrecta), especially for certain lung cancers. It’s important to discuss with your care team what MET means for your specific situation.

Foretinib, also known as MET/VEGFR-2 Inhibitor GSK1363089 or XL880, is an experimental drug studied for cancer treatment. It works by blocking enzymes that help tumors grow and spread, including those that support new blood vessel formation. Foretinib is not yet approved for routine use and is mainly available through clinical trials. Patients should discuss its meaning and potential use with their care team.

A meta-analysis is a way researchers combine results from many studies about the same topic to get a clearer, stronger answer. For patients and caregivers, it’s important to understand that a meta-analysis summarizes research findings but does not replace personalized medical advice. Always ask your care team how such research applies to your individual situation.

Metabolic refers to the chemical processes in the body that produce energy and support life. In cancer care, metabolic health involves nutrition, inflammation, digestion, and how well the body tolerates treatment. Doctors may use blood tests like metabolic panels to check these processes and guide care decisions. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Metabolic acidosis is a condition where the blood becomes too acidic. In cancer care, it can happen because of the cancer itself or as a side effect of treatments like chemotherapy. It is diagnosed by blood tests and may cause symptoms like tiredness or breathing changes. Treatment focuses on correcting the acid balance, often with medicines or diet changes. Always ask your care team what it means for you personally.

Metabolic Cancer Therapy refers to diet or nutrition approaches discussed in cancer care to support nutrition, metabolism, inflammation, digestion, immune health, and treatment tolerance. It may be used as supportive care or proposed as an alternative cancer treatment. Patients should discuss any such protocols with their healthcare team to understand safety, evidence, and how it fits with their overall cancer treatment plan.

A metabolic disorder is a condition where the body’s normal process of breaking down and using food for energy is disrupted, often due to missing or faulty enzymes. Symptoms can include tiredness, weight loss, jaundice (yellowing of skin or eyes), and seizures. These disorders may be inherited or caused by other health issues. If you see this term, ask your care team how it relates to your specific situation.

Metabolic syndrome is a group of health problems that often occur together, including extra fat around the waist, high blood pressure, high blood sugar, high triglycerides, and low “good” cholesterol. Having metabolic syndrome raises your risk for heart disease, type 2 diabetes, stroke, and certain cancers. It is linked to lifestyle factors like being overweight and inactive, and managing it often involves healthy eating, exercise, and sometimes medication.

Metabolic Syndrome X, also called metabolic syndrome, is a group of health problems including extra belly fat, high blood pressure, high blood sugar, high blood fats, and low good cholesterol. Having this syndrome raises your risk for heart disease, type 2 diabetes, stroke, and some cancers. It is often linked to being overweight and inactive, and managing it usually involves healthy lifestyle changes and sometimes medication.

Metabolic Therapy refers to treatments aimed at correcting changes in the body’s metabolism caused by disease. In cancer care, approaches like Dichloroacetate (DCA) Metabolic Therapy are sometimes explored for possible anticancer effects, symptom relief, or to support nutrition and treatment tolerance. These are considered complementary or alternative methods and should always be discussed with a healthcare provider before use.

Metabolic Therapy Diet refers to nutrition plans or protocols discussed in cancer care for supporting nutrition, metabolism, immune health, digestion, and treatment tolerance. Some people explore it for symptom relief or quality of life, while others consider it as an alternative or complementary approach. Evidence for direct anticancer effects is limited, and safety concerns exist, so it should be discussed with a healthcare provider.

Metabolic type is a concept from alternative medicine that groups people based on visible traits and metabolism to suggest personalized diets. It classifies individuals into types like protein, carbohydrate, or mixed, aiming to tailor nutrition. However, metabolic typing lacks scientific proof and is not a recognized medical diagnosis or treatment. Patients should discuss any related plans with their healthcare team to understand what it means for their care.

Metabolism refers to the chemical processes in the body that create energy and build or break down materials cells need to grow and stay healthy. In cancer care, metabolism may be studied to understand how cancer cells grow or respond to treatment. Patients should ask their care team how metabolism relates to their specific diagnosis or treatment, rather than focusing on the word alone.

A metabolite is a substance made or used when the body breaks down food, drugs, or its own tissues. In cancer care, some drugs called antimetabolites work by mimicking natural metabolites to block cancer cells from growing. Understanding the term can help patients ask informed questions about treatments, but it’s important to discuss what it means for each person’s care with their healthcare team.

Metabolomics is the study of small molecules called metabolites in the body. It helps researchers understand how diseases like cancer affect the body’s chemistry. For patients, metabolomics may come up when discussing new or experimental cancer treatments that target how cancer cells produce energy. It’s important to ask your care team what metabolomics means for your specific situation rather than seeing it as a diagnosis or treatment on its own.

A Metaiodobenzylguanidine Scan, also called an Iobenguane Scan or MIBG Scan, is a special imaging test used to find certain nerve-related tumors like pheochromocytomas and paragangliomas. It involves injecting a small amount of a radioactive substance that tumor cells absorb, allowing doctors to see the tumors with a scanner. This test helps guide diagnosis and treatment decisions.

In cancer care, the word "metallic" often refers to a change in taste caused by some treatments, making foods taste metallic. It can also relate to medical imaging tests using barium, a metallic substance, to help find tumors or changes in the digestive system. Always ask your care team how "metallic" applies to your situation rather than assuming it means a diagnosis or treatment.

A metallic endoprosthesis is a metal device placed inside the body to replace a body part removed during cancer surgery. It is often used when bones, such as the thigh bone, are removed to treat cancer. If you hear this term, it’s important to ask your care team how it applies to your situation rather than assuming it means a specific diagnosis or treatment.

Metaplasia is a change where one type of cell transforms into another type that is not normally found in that tissue. This change can happen as a response to irritation or injury. While metaplasia itself is not cancer, it can sometimes increase the risk of developing cancer if the cause is not removed. Understanding metaplasia helps patients and caregivers follow their care and ask questions about their health.

Metaplastic carcinoma is a rare type of breast cancer made up of different kinds of cells that have changed from their usual form. It often grows quickly and may not respond to hormone treatments. Because it varies a lot, it’s important to talk with your care team about what this diagnosis means for you personally.

Metastasectomy is a surgery that removes all visible tumors that have spread from the original cancer to other parts of the body. It aims to reduce cancer spread by cutting out known metastatic tumors. While it may help control the disease or improve symptoms, it does not guarantee all cancer cells are gone. Patients should discuss with their care team how this surgery fits their treatment plan.

Metastasis is when cancer cells spread from where they first formed to other parts of the body. These new tumors are made of the same type of cancer cells as the original tumor. Metastasis can cause symptoms depending on where the cancer spreads, but sometimes there are no symptoms. Understanding metastasis helps patients and caregivers ask the right questions about diagnosis, treatment, and care options.

Metastasis-Free Survival (MFS) is the length of time after cancer treatment during which the patient is alive and the cancer has not spread to other parts of the body. It helps doctors understand how well a treatment is working by tracking if and when cancer spreads. MFS is often used in clinical trials and cancer care to monitor disease progress and guide treatment decisions.

Metastasize means cancer cells have spread from where they first formed to other parts of the body. When this happens, the new tumors are made of cells like the original cancer, not the new location. This can affect treatment options and symptoms. Patients can always receive care to manage symptoms, whether or not cancer treatment continues.

Metastatic cancer is cancer that has spread from where it first started to other parts of the body. This spread is called metastasis. Metastatic cancer cells look like the original cancer cells, not the cells of the new location. Symptoms depend on where the cancer has spread. Treatments aim to control growth, relieve symptoms, and improve quality of life. Talking with your care team about what metastatic means for you is important.

Metasynchronous means that two or more events happen at nearly the same time. In cancer care, this term might describe tumors or changes that appear almost simultaneously. It’s important for patients and caregivers to understand this word in context and ask their healthcare team how it applies to their specific situation, rather than assuming it defines a diagnosis or treatment plan on its own.

Meteorism, also called tympanites, means swelling of the belly caused by gas buildup in the intestines or the space around them. It is a word you might see in medical reports or cancer care materials. If you come across this term, it’s important to ask your care team what it means for you personally, rather than assuming it is a diagnosis or treatment on its own.

Metformin Hydrochloride, also known as Glucophage, is a medication commonly used to treat type 2 diabetes. It helps lower blood sugar by reducing glucose released from the liver and improving the body’s use of sugar. It is sometimes studied in cancer care, but its role there is still being researched. Patients should ask their care team how it applies to their personal health.

Methadone hydrochloride is a synthetic opioid medicine used to relieve moderate to severe pain, including pain related to cancer or its treatment. It works by attaching to opioid receptors in the nervous system to block pain signals. Methadone may also be used to help people manage opioid addiction. Patients should always discuss with their care team how methadone fits into their personal pain management plan.

Methanol, also known as methyl alcohol or wood alcohol, is a simple type of alcohol used in products like antifreeze and paint thinner. It is a colorless, flammable liquid that is poisonous if swallowed or inhaled. Methanol may appear in medical or chemical reports under different names, so it’s important to ask your care team what it means for your specific situation.

Methemoglobin is a form of hemoglobin in the blood that cannot carry oxygen. Normally, only a small amount is present, but higher levels can reduce oxygen delivery to the body. Symptoms depend on how much methemoglobin is in the blood and a person’s overall health. It’s important to understand methemoglobin results in context and discuss what they mean for you with your care team.

Methemoglobinemia is a condition where an abnormal form of hemoglobin called methemoglobin builds up in the blood. This form cannot carry oxygen well, which may cause symptoms like blue-tinged skin, headache, dizziness, and shortness of breath. It can happen due to certain medications, chemicals, inherited conditions, or environmental exposures. Understanding this term in context and discussing it with your care team is important for your individual situation.

Methicillin-Resistant Staphylococcus Aureus (MRSA) is a type of bacteria that causes infections resistant to many common antibiotics. MRSA infections often affect the skin and are usually mild, but they can sometimes become serious. People with weakened immune systems, such as those in hospitals or nursing homes, are more likely to get MRSA. The term MRSA may appear in medical reports or discussions about infections.

A Methionine Restriction Diet is a nutrition approach that limits the amino acid methionine, discussed in cancer care for its potential effects on metabolism, inflammation, digestion, immune health, and treatment tolerance. It is considered experimental and should be reviewed with healthcare providers before use, especially in cancer patients with complex health needs.

Methodology refers to the set of rules and procedures used in medical research to study diseases like cancer. It guides how researchers design studies, collect and analyze data, and interpret results. Understanding methodology helps patients and caregivers ask informed questions about tests, treatments, or research findings mentioned in their care.

Methotrexate Sodium is a chemotherapy drug also known as MTX, Trexall, or Xatmep. It works by blocking cells from using folic acid to make DNA, which can help kill cancer cells. It is used alone or with other drugs to treat certain cancers and some other medical conditions. Patients should always ask their care team how this drug applies to their specific situation.

Methoxsalen is a medication used with ultraviolet (UV) light to treat skin conditions like psoriasis, vitiligo, and certain types of cutaneous T-cell lymphoma. It belongs to a group of natural plant substances called psoralens that become active when exposed to light. Methoxsalen is also being studied for use in graft-versus-host disease. Patients should always discuss how it applies to their care with their medical team.

Methoxyamine Hydrochloride is a chemical being studied in cancer treatment. It works by blocking cancer cells’ ability to repair damaged DNA, which may help kill them or make other cancer drugs work better. If you see this term, ask your care team how it relates to your specific care, as it is not a diagnosis or a treatment on its own.

Methoxypolyethylene Glycol Epoetin Beta is a lab-made medicine that helps the body produce more red blood cells. It is used to treat anemia, especially in people receiving chemotherapy or with kidney problems. Sometimes called Ro 50-3821, it is important to ask your care team how this medicine fits into your treatment plan rather than assuming it is a cancer treatment itself.

Methanol, also called methyl alcohol or wood alcohol, is a clear, colorless, and flammable liquid used in products like antifreeze and paint thinner. It is poisonous if swallowed or inhaled. Methanol may appear under different names in medical or chemical reports, so it’s important to ask your healthcare team what it means for your specific situation.

A methyl group is a small chemical part made of one carbon atom bonded to three hydrogen atoms. In the body, methyl groups can attach to DNA or proteins, which may change how these molecules work. This process can influence gene activity and is important in understanding some changes seen in cancer. If you see this term, ask your care team how it relates to your health rather than assuming it means a diagnosis or treatment.

Methyl-1,4-benzoquinone is a natural chemical found in the defensive secretions of certain beetles, including Ulomoides dermestoides. It is sometimes mentioned in alternative medicine but is not an approved cancer treatment. Patients should ask their care team how this term relates to their care rather than assuming it indicates a diagnosis or therapy.

Methyl-5-Aminolevulinate is a drug used in a type of cancer treatment called photodynamic therapy. It is absorbed by tumor cells and, when exposed to a special light, becomes active and helps kill those cancer cells. Patients should discuss with their care team how this drug might be part of their treatment plan, rather than assuming it applies to everyone.

Methylation is a natural chemical process where small groups called methyl groups are added to DNA or proteins. This can change how genes work, sometimes turning them off. Changes in methylation patterns can affect a person’s risk of diseases like cancer. If you hear this term, it’s important to ask your care team how it relates to your specific situation rather than seeing it as a diagnosis or treatment by itself.

Methylene blue is a synthetic compound used medically for over a century, mainly to treat conditions like methemoglobinemia. It is available without a prescription in pharmaceutical-grade form. Some patients explore its use in cancer care, often combined with light therapy, but it is important to discuss this with your healthcare team before use, especially because it can interact with certain medications like antidepressants.

Methylnaltrexone bromide, also known as Relistor, is a medication used to treat constipation caused by opioid pain medicines. It works by blocking opioid effects outside the brain, helping relieve constipation without reducing pain relief. It is often used by adults with cancer or other serious illnesses who take opioids for pain.

Methylphenidate Hydrochloride is a medication also known as Concerta or Ritalin. It is a stimulant that helps improve focus and attention, commonly used to treat ADHD. In cancer care, it is being studied to help with thinking and memory problems that sometimes occur after cancer treatments. You might see these names in your medical records or hear them during discussions with your care team.

Methylprednisolone is a corticosteroid medicine often used with other drugs to treat prostate cancer that no longer responds to hormone therapies lowering testosterone. It helps manage side effects and supports treatment in cases where cancer is high risk but still sensitive to hormone therapy. Patients should discuss with their care team how methylprednisolone fits into their specific treatment plan.

Metoclopramide (also called Reglan) is a medicine that helps the stomach and upper intestines move food and liquids more easily. It is often used to treat nausea and vomiting caused by chemotherapy or other conditions. If you see this name in your care, ask your healthcare team how it applies to you, rather than assuming it means a specific diagnosis or treatment.

Metronidazole, also known by the brand name Flagyl, is an antibiotic and antiprotozoal medicine used to treat certain infections. It may appear in cancer care mainly to manage infections or in research related to radiation therapy. Patients should always ask their care team how it applies to their specific situation rather than assuming it is a cancer treatment.

Metronomic Chemotherapy, also called Low-Dose Chemotherapy, is a way of giving chemotherapy drugs in smaller amounts regularly over a long time. This approach aims to slow cancer growth by preventing tumors from forming new blood vessels, often causing fewer side effects than standard chemotherapy. Patients should talk with their care team to understand how this treatment fits their personal care plan.

A MeV Linear Accelerator, often called a linac, is a machine used in radiation therapy to treat cancer. It uses electricity to speed up tiny particles, creating high-energy X-rays or electron beams that target tumors. This helps doctors deliver radiation precisely to cancer cells while protecting nearby healthy tissue. It may also appear under related names such as Linac, Linear Accelerator, And Mega-Voltage Linear Accelerator.

Mevacor, also known as lovastatin, is a medication used to lower cholesterol in the blood. It belongs to a group of drugs called statins that help reduce the risk of heart disease. While not a cancer treatment, it may be mentioned in cancer care to manage heart health or other conditions. Always ask your care team how it applies to your personal situation.

The mevalonate pathway is a natural process in cells that helps make important molecules like cholesterol and other substances needed for cell function. Some medicines, such as statins, work by affecting this pathway. If you see this term in your care, it’s best to ask your healthcare team how it relates to your specific situation rather than assuming it means a diagnosis or treatment by itself.

Mexican Valerian is a plant whose roots have been used as a natural sedative to help with relaxation and sleep. It is also known by several other names, including garden heliotrope, Indian valerian, and Valeriana officinalis. Researchers are studying it to see if it can improve sleep for cancer patients undergoing treatment. It is not a standard cancer treatment but may be considered as a complementary approach.

MFS, or Metastasis-Free Survival, is the length of time after cancer treatment during which a patient is alive and the cancer has not spread to other parts of the body. It helps doctors understand how well a treatment is working and is often used in clinical trials to measure treatment success.

MG98 is a substance being studied as a possible cancer treatment. It works by blocking a protein called DNA methyltransferase, which helps control how genes are turned on or off. This may help stop cancer cells from growing. If you see MG98 mentioned, it’s important to talk with your care team about what it means for your specific situation.

Mocetinostat, also known as MGCD0103, is an experimental cancer drug studied for several types of cancer. It works by blocking enzymes called histone deacetylases (HDACs), which can help control how cancer cells grow and survive. Mocetinostat is not yet a standard treatment but is being tested in clinical trials, especially for certain blood cancers like lymphoma and leukemia.

Biobran, also known as MGN-3 or Arabinoxylan Rice Bran, is a natural supplement made from rice bran treated with enzymes from shiitake mushrooms. It is thought to support the immune system by helping certain immune cells become more active. While some early research suggests it may boost immune responses, especially in older adults, it is not a treatment for cancer and should be used only under medical guidance.

MGPT, or Multigene Panel Test, is a laboratory test that looks for changes (mutations) in many genes at once. These changes may increase a person’s risk of diseases like cancer. MGPT can help doctors understand cancer risks, plan treatments, or predict if cancer might spread or return. It is also called multigene test or multigene panel test, so checking the exact name in reports can help avoid confusion.

MGUS (Monoclonal Gammopathy of Undetermined Significance) is a condition where small amounts of an abnormal protein called M Protein are found in the blood without causing symptoms or disease. It does not require immediate treatment but needs regular monitoring because it can increase the risk of developing certain blood cancers over time.

Menopausal Hormone Therapy (MHT) is a treatment that replaces hormones like estrogen and progesterone that decrease during and after menopause. It helps relieve symptoms such as hot flashes, night sweats, vaginal dryness, and bone thinning. MHT can be given as pills, patches, creams, or gels. While it can improve quality of life, it also carries some risks, so discussing benefits and risks with your healthcare provider is important.

An MIBG scan (also called an iobenguane scan or metaiodobenzylguanidine scan) is a special imaging test used to find certain neuroendocrine tumors, like neuroblastomas and pheochromocytomas. It involves injecting a small amount of a radioactive substance into a vein, which travels through the bloodstream and attaches to tumor cells. A scanner then detects these cells to help doctors locate tumors.

A micelle is a tiny ball-shaped particle made of molecules that can carry substances inside them. In cancer care, micelles are used in special drug forms like paclitaxel-loaded polymeric micelles to help chemotherapy drugs dissolve better in water and reach cancer cells more effectively. If you see the word micelle in your medical information, ask your healthcare team what it means for your treatment.

A microarray is a laboratory test that looks at many genes or proteins at once to see which are active in cells or tissue. It helps doctors learn more about diseases like cancer. For patients, it’s important to ask your care team how microarray results relate to your specific situation, rather than seeing the term alone as a diagnosis or treatment plan.

A microbicide, also called a germicide, is any substance or method that kills germs like bacteria, viruses, or other microorganisms that can cause infections. In cancer care, understanding microbicides helps patients and caregivers recognize how infection risks are managed. It’s important to ask your healthcare team how this term applies to your specific situation rather than assuming it refers to a diagnosis or treatment.

The microbiome is the community of tiny living things, like bacteria and viruses, that live in and on our bodies, especially in places like the digestive system. These microorganisms can affect health and may play a role in cancer prevention, treatment, and recovery. Patients should discuss any diet or supplement changes related to the microbiome with their healthcare team to ensure safety and avoid interactions during cancer care.

Microbiome-Targeted Cancer Diets are nutrition plans aimed at supporting the balance of bacteria and other microbes in the gut. These diets are discussed in cancer care for their potential effects on nutrition, digestion, inflammation, immune health, and how well patients tolerate treatment. Patients should always consult their healthcare team before starting such diets, as cancer and its treatments can cause special health challenges.

Microbiota Restoration Diets are nutrition plans aimed at supporting the balance of gut bacteria. They are discussed in cancer care for their potential effects on digestion, inflammation, immune health, and treatment tolerance. These diets may be used alongside conventional treatments but should always be reviewed with healthcare providers to ensure safety and appropriateness.

Microcalcifications are tiny deposits of calcium in the breast that cannot be felt but can be seen on a mammogram. When these small specks cluster together, they may sometimes suggest early breast cancer or precancerous changes. It’s important to understand microcalcifications in context and discuss their meaning with your healthcare team rather than assuming they are a diagnosis or require treatment.

Microcurrent Therapy uses very low electrical currents to stimulate nerves and tissues. It is sometimes discussed in cancer care for pain relief, reducing inflammation, healing scars, and improving overall comfort. While some claim it may help with cancer treatment or prevention, these uses are not proven. Patients should always talk with their healthcare team before trying this therapy during cancer treatment.

The microenvironment is the area around cells, including other cells, molecules, and blood vessels that support them. In cancer, the microenvironment can change and affect how cancer cells grow and spread. Understanding this environment helps doctors learn more about cancer and may guide treatment decisions. Patients should ask their care team how this term relates to their own diagnosis or treatment.

Microflora, also called gut flora or intestinal flora, is the community of bacteria and other tiny organisms living in the intestines. These helpful microorganisms aid digestion and produce vitamins like biotin and vitamin K. You might see these terms in medical reports or cancer care discussions. It’s important to understand them in context and ask your healthcare team how they relate to your health or treatment.

A microfluidic device, also called a lab-on-a-chip, is a small tool that uses tiny amounts of fluid on a chip to perform laboratory tests. These devices can help doctors run tests quickly and easily, even outside of traditional labs. They are especially useful for point-of-care testing in places with limited medical resources.

A microgram is a very small unit of weight used in medicine and science. It equals one millionth of a gram. You might see it in medication doses or lab results. In the US, it’s often written as mcg to avoid confusion with similar abbreviations. If you see this term, ask your care team what it means for your specific treatment or test.

A microliter (µL) is a very small measure of liquid volume, equal to one millionth of a liter. You might see this term in medical reports or lab results. It’s important to understand it in context and ask your care team how it relates to your specific situation, rather than interpreting the term alone as a diagnosis or treatment advice.

A micrometastasis is a tiny group of cancer cells that have broken away from the original tumor and spread to another part of the body through the lymphatic or blood vessels. These cells are too small to be seen on regular scans or tests. Finding micrometastases can help doctors decide the best treatment, but the term alone is not a diagnosis or treatment plan. Always ask your care team what it means for you.

Micromolar (μM) is a unit used to describe the concentration of a substance in a liquid, meaning one millionth of a mole per liter. In cancer care, it helps measure how much of a chemical, like a drug or molecule, is present in a sample. Patients should understand this term in context and ask their care team what it means for their specific situation.

A micromole (µM) is a unit used to measure very small amounts of substances like drugs or hormones in the body. In cancer care, it helps describe precise levels important for diagnosis and treatment. If you see this term in your reports, ask your healthcare team what it means for your specific situation rather than interpreting it alone.

Micronutrients are tiny amounts of vitamins and minerals the body needs to grow and stay healthy. While they are not treatments for cancer, eating foods rich in micronutrients can support overall health during cancer care. Patients should discuss with their healthcare team how micronutrient intake fits their individual treatment and nutrition needs.

A microorganism is a tiny living thing that can only be seen with a microscope. These include bacteria, fungi, and other germs. In cancer care, microorganisms are important because some can cause infections, especially when treatments like chemotherapy weaken the immune system. Understanding this term helps you talk with your care team about infection risks and how medicines like antibiotics may be used to keep you safe.

MicroRNA (miRNA) is a small type of RNA found inside cells and in the blood. These tiny molecules can attach to messenger RNA (mRNA) to block it from making proteins. Scientists are studying microRNAs to better understand cancer and to develop new ways to diagnose and treat it. The term may also appear as Mirna in medical reports.

Microsatellites are short, repeated sequences of DNA found throughout the human genome. In cancer care, changes in these sequences, called microsatellite instability, can affect how cancer behaves and responds to treatment. Testing for microsatellite changes helps doctors understand certain cancers better and may guide treatment choices, especially for advanced or recurrent cancers.

Microsatellite instability (MSI) is a change in certain DNA sequences in cancer cells caused by mistakes that are not fixed when DNA is copied. It is found in some cancers like colon, stomach, and endometrial cancer. Knowing if a tumor has MSI can help doctors choose treatments, including immunotherapy drugs like Keytruda, which may work better for these cancers.

Microsatellite Instability-High (MSI-H) cancer describes cancer cells with many changes in short repeated DNA sequences called microsatellites. These cancers often have trouble fixing DNA copying mistakes. MSI-H is found most often in colorectal, stomach, and endometrial cancers. Knowing if a cancer is MSI-H can help doctors choose the best treatment, including some immunotherapy options.

A microsatellite tumor is a tiny group of cancer cells found near the original melanoma tumor but separate from it. These small tumors can only be seen under a microscope. Finding microsatellite tumors means the melanoma has spread beyond its first site. This term often appears in describing stage IIIB melanoma when the original tumor is not visible but cancer is found in lymph nodes or as microsatellite tumors.

A microscope is a tool that helps doctors look closely at cells and tiny tissue samples that cannot be seen with the naked eye. It is often used to check for cancer cells in tissue samples taken from the body, such as during a biopsy. This detailed view helps doctors diagnose cancer and decide on the best treatment options.

Microscopic means too small to be seen without a microscope. In cancer care, doctors use microscopic descriptions to look closely at cells and tissues to help diagnose disease and plan treatment. For patients, it’s important to understand this term in context and ask your care team how it applies to your specific situation rather than seeing it as a diagnosis by itself.

A microscopic description is part of a pathology report that explains what cells or tissue samples look like under a microscope. It helps doctors diagnose diseases like cancer and plan treatment. For patients, it’s important to understand this description in context and ask the care team how it applies to their specific situation rather than seeing it as a diagnosis on its own.

Microspheres are tiny, round particles made from materials like glass or plastic. In cancer care, they may be injected into blood vessels feeding a tumor to block its blood supply or deliver substances that help kill tumor cells. It’s important to understand the term in context and ask your care team how it relates to your specific situation, rather than seeing it as a diagnosis or treatment on its own.

Microstaging is a way doctors examine a small sample of skin with cancer under a microscope to see how thick the tumor is and how deeply it has grown. This helps them understand the stage, or extent, of melanoma and some squamous cell skin cancers. Patients should ask their care team what microstaging means for their specific case rather than assuming it is a diagnosis or treatment plan.

Microtubules are tiny tube-like structures inside cells that help keep their shape and assist in cell division. In cancer care, some chemotherapy drugs called antimicrotubule agents work by targeting microtubules to stop cancer cells from dividing. Not all patients receive these drugs, and effects can vary. It’s important to understand the term in context and ask your care team how it relates to your treatment.

Microwave acupuncture is a type of acupuncture where a small microwave device is attached to an acupuncture needle to deliver microwave radiation at specific points on the body. It is important for patients and caregivers to understand this term in context and discuss with their care team how it might relate to their individual care, rather than seeing it as a diagnosis or treatment recommendation on its own.

Microwave therapy, also called microwave thermotherapy, is a treatment that uses microwave energy to heat body tissue. This heating can damage and kill cancer cells or make them more sensitive to radiation and certain cancer drugs. It is sometimes used to help treat cancer or other medical conditions by applying controlled heat to targeted areas.

Microwave thermotherapy is a treatment that uses microwave energy to heat body tissue. This heating can damage and kill cancer cells or make them more sensitive to radiation and certain cancer drugs. A specific form, transurethral microwave thermotherapy (TUMT), is used to treat urinary symptoms caused by an enlarged prostate. It is a minimally invasive procedure with some risks like urinary retention and infection. Patients should discuss how this treatment applies to their care with their healthcare team.

Midazolam hydrochloride, also known as Versed, is a medication used to relieve anxiety, tension, and muscle spasms. It belongs to a group of drugs called benzodiazepines. In cancer care, it is being studied for helping with nausea and vomiting caused by some treatments. Patients may see this term in medical reports or treatment plans and should ask their care team how it applies to their situation.

Midostaurin (also known as N-Benzoyl-Staurosporine, PKC412, or Rydapt) is a targeted cancer medicine used mainly to treat certain blood cancers in adults. It works by blocking proteins that help cancer cells grow. Midostaurin is often used with chemotherapy to treat acute myeloid leukemia (AML) with specific gene changes and some mast cell diseases. If you hear this name, ask your care team how it relates to your treatment.

Mifamurtide, also known as MEPACT or L-MTP-PE, is a drug that helps activate the immune system to fight certain bone cancers, especially osteosarcoma in children and young adults. It works by stimulating white blood cells to attack cancer cells and is usually given after surgery and chemotherapy. Patients should ask their care team how this drug relates to their treatment plan.

Mifeprex, also known as mifepristone or RU 486, is a medication that blocks the hormone progesterone. It is commonly used to end early pregnancies but is also being studied for treating some types of cancer. For patients and caregivers, it’s important to understand Mifeprex in the context of individual care and to ask the healthcare team how it applies to their situation rather than assuming it is a diagnosis or treatment on its own.

Mifepristone, also known as Mifeprex or RU 486, is a medication that blocks the hormone progesterone. It is commonly used to end early pregnancies and is being studied for treating some types of cancer. Patients should ask their healthcare team how it applies to their specific situation, as the term alone does not indicate a diagnosis or treatment plan.

Milatuzumab, also called hLL1 or IMMU-110, is a laboratory-made antibody being studied to treat certain blood cancers like multiple myeloma. It targets a protein called CD74 found on some cancer cells and may help kill them. Sometimes it is combined with chemotherapy drugs in research. It is not yet a standard treatment but has received special status for rare diseases.

Milk ducts, also called breast ducts, are tiny tubes in the breast that carry milk from milk-producing areas to the nipple. Changes or lumps in these ducts, such as cysts, fibroadenomas, or intraductal papillomas, are usually benign but can cause symptoms like pain or swelling. Atypical ductal hyperplasia (ADH) is a non-cancerous condition where cells in the milk ducts grow abnormally and may increase breast cancer risk.

Milk Thistle, also known as Silymarin or Silybum marianum, is a plant extract often discussed in cancer care. It is used by some people to support liver health, reduce side effects of cancer treatments, improve nutrition, and enhance quality of life. While it is available as a dietary supplement, its safety and effectiveness during cancer treatment should be discussed with a healthcare provider.

Milk Thistle, also known as Silymarin, is a plant extract often used to support liver health and reduce side effects during cancer treatment. Some people use it to help with symptom relief, nutrition, and quality of life. While it is available as a supplement, its safety and effectiveness during cancer care should be discussed with a healthcare provider.

A milligram (mg) is a very small unit of weight used to measure medicines, supplements, and other substances. It is about 1/1,000 of a gram and much smaller than a pound or ounce. Patients often see milligrams listed in medication doses or supplement amounts. Understanding milligrams helps you follow treatment plans safely and ask your care team questions about your medicines or test results.

A milliliter (mL), also called a cubic centimeter (cc), is a unit used to measure volume in medicine. It helps describe amounts of fluids, medications, or tissue sizes. Knowing that cc, cubic centimeter, and milliliter all mean the same thing can make it easier to understand medical reports and follow treatment instructions during cancer care.

A millimeter is a unit of length in the metric system, equal to one thousandth of a meter. In cancer care, measurements in millimeters are often used to describe how deeply a tumor has grown into the skin, such as with Breslow thickness. Understanding this term can help patients ask questions about their diagnosis and treatment, but it’s important to discuss what it means for each individual case with the care team.

A millimole (mmol) is a unit used to measure the amount of a substance, equal to one-thousandth of a mole. In cancer care, you might see this term in lab results or treatment information. It’s important to understand millimole in context and ask your care team how it relates to your specific situation, rather than interpreting the term alone as a diagnosis or treatment advice.

Mind-body exercise includes activities like yoga, tai chi, and qigong that combine gentle body movements, focused attention, and controlled breathing. These exercises aim to improve strength, balance, flexibility, and overall well-being. For patients and caregivers, it’s important to understand how mind-body exercise fits into individual care plans by discussing it with the healthcare team rather than assuming it is a specific treatment or diagnosis.

Mind-Body Modality is a health practice that combines mental focus, controlled breathing, and body movements to help relax the body and mind. Examples include meditation, hypnosis, guided imagery, yoga, and tai chi. Often used as a complementary approach, it may help with pain, stress, anxiety, and overall well-being during cancer care. Patients should discuss how it applies to their care with their medical team.

Mind-Body Practice is a supportive health approach that combines mental focus, controlled breathing, and gentle body movements to help relax the mind and body. Common examples include meditation, yoga, tai chi, hypnosis, and guided imagery. Often used alongside cancer treatment, these practices aim to reduce stress, ease symptoms like pain or anxiety, and improve overall well-being. Always talk with your care team before starting any mind-body practice during cancer care.

Mindfulness Practices are techniques that help you focus on the present moment to manage emotions, stress, and discomfort during cancer care. Often used alongside medical treatments, these practices may support symptom relief, reduce anxiety, improve sleep, and enhance quality of life. They are considered complementary and should be discussed with your healthcare team to ensure safety and fit with your overall care.

Mindfulness Relaxation is a type of meditation that helps you focus on the present moment with calm awareness. It uses breathing, guided imagery, and other techniques to relax your body and mind, which may reduce stress and improve mental and physical well-being. It is often used by patients and caregivers to support coping during illness but is not a medical treatment by itself.

Meditation and Mindfulness-Based Stress Reduction (MBSR) are practices that help calm the mind by focusing on breathing, body awareness, or repeating calming words. Often used alongside cancer treatment, these techniques may help reduce stress, anxiety, pain, and sleep problems, supporting overall well-being and coping during cancer care. If a record says to see Meditation / Mindfulness-Based Stress Reduction (MBSR), that preferred term should usually be checked as well. It may also appear under related names such as Meditation / Mindfulness-Based.

Minerals are nutrients your body needs in small amounts to stay healthy. They include calcium, magnesium, and iron. In cancer care, minerals are important because cancer or its treatments can affect how your body absorbs or uses them. Understanding minerals helps you talk with your care team about bone health, nutrition, and managing symptoms during treatment.

Mineral oil is a clear, odorless oil made from petroleum. It is commonly used in medicines like laxatives and in skin creams or lotions. In cancer care, understanding mineral oil’s role and context is important. Patients should always ask their care team how mineral oil or related terms apply to their specific situation rather than assuming it means a diagnosis or treatment on its own.

A mini-transplant, also called a non-myeloablative or reduced-intensity transplant, is a type of donor stem cell transplant that uses lower doses of chemotherapy or radiation than a standard transplant. It is often an option for people who are older or have health issues that make a full transplant too risky. This procedure helps restore healthy blood cells while reducing some side effects of stronger treatments.

Minimal Residual Disease (MRD), also called measurable residual disease, means a very small number of cancer cells that remain in the body during or after treatment. These cells are too few to be seen with regular tests but can be found using highly sensitive lab methods. MRD testing is mainly used for blood cancers like leukemia and lymphoma to help doctors understand treatment response and the chance of cancer returning.

Minimal sedation, also called anxiolysis, is a mild form of sedation that helps you feel calm and relaxed during medical procedures. You usually stay awake and able to respond to questions or instructions. It is often used in cancer care to reduce anxiety during tests or minor surgeries, making these experiences easier while keeping you alert and cooperative.

Minimally invasive surgery is a type of surgery done through small cuts using special tools and cameras. It often causes less pain, smaller scars, and quicker recovery compared to traditional surgery. Patients usually need fewer stitches and may spend less time in the hospital. It’s important to ask your care team how this type of surgery applies to your specific situation.

Minocycline-EDTA, also called M-EDTA, is a combination of an antibiotic and a chemical that helps prevent blood clots. It is being studied to reduce bacterial infections in catheters—thin tubes used to deliver fluids or medicines into the body. This combination may help stop bacteria from forming protective layers on catheters, lowering infection risks. It is not yet a standard treatment but is part of ongoing research.

The MIP Test, or Maximum Inspiratory Pressure Test, measures the strength of the muscles you use to breathe in. It is a quick, painless test where you breathe through a device that records the pressure your breathing muscles create. This test helps your care team understand how well your breathing muscles are working, especially if cancer or its treatment might affect your lungs or breathing.

The Miraluma Test, also called scintimammography or sestamibi breast imaging, is a special breast imaging test used to help find cancer cells in women who have had abnormal mammograms or have dense breast tissue. It involves a small injection of a radioactive substance and pictures taken with a special camera. It is not used for routine breast cancer screening or to replace mammograms.

MicroRNA (miRNA) is a very small type of RNA found inside cells and in the blood. Unlike messenger RNA (mRNA), miRNAs do not make proteins. Instead, they attach to mRNA to block protein production. Scientists are studying miRNAs to better understand cancer and to develop new ways to diagnose and treat it. The term may also appear as Mirna in medical reports.

Mirtazapine, also known by the brand name Remeron, is a type of antidepressant used mainly to treat depression. It works by increasing certain brain chemicals that help improve mood. Mirtazapine may also help with sleep problems related to depression. It is taken by mouth and is approved for use in adults with major depressive disorder.

Mirvetuximab soravtansine, sold as Elahere, is a targeted cancer treatment for adults with certain advanced ovarian, fallopian tube, or primary peritoneal cancers that test positive for folate receptor alpha. It is used when these cancers have not improved after platinum-based chemotherapy and other treatments. This medicine combines an antibody that targets cancer cells with a drug that may help kill them.

A miscarriage is the unexpected loss of a pregnancy before the 20th week. It often happens early, sometimes before a person knows they are pregnant. Signs can include vaginal bleeding, cramping, and passing tissue. Miscarriages usually occur due to genetic problems in the fetus or health issues in the pregnant person. Treatment depends on how far along the pregnancy was and may include monitoring or medical procedures.

Mismatch Repair Deficiency (dMMR) means certain cells have trouble fixing mistakes made when DNA is copied. This can cause many DNA mutations and may increase the risk of cancer. It is most often found in colorectal, gastrointestinal, and endometrial cancers. Knowing if a tumor has dMMR can help doctors plan treatment and predict how well it might respond to therapy.

Misoprostol is a medication originally developed to prevent stomach ulcers caused by certain pain relievers. It is also used to help soften the cervix before some medical procedures and to induce labor or manage bleeding after childbirth. Misoprostol should not be used during pregnancy unless under medical supervision, as it can cause contractions and pregnancy loss. Its use in cancer care is limited and should always be discussed with your healthcare team.

A missense mutation is a change in a gene’s DNA that swaps one building block of a protein (an amino acid) for a different one. This change can sometimes affect how the protein works, but other times it may have little or no effect. The term may also appear as missense variant. It’s important to understand this term in context and ask your care team what it means for your specific situation.

A missense variant (also called a missense mutation) is a change in a gene’s DNA that swaps one building block of a protein (an amino acid) for a different one. This change can sometimes affect how the protein works, but other times it may have little or no effect. It’s important to ask your care team what this means for your specific health situation.

Missing data refers to important information that was not collected or recorded during a medical study or treatment evaluation. In cancer research and care, missing data can affect how well results represent patients’ experiences and how reliable conclusions are. Understanding and handling missing data carefully helps doctors and researchers make better decisions about treatments and outcomes.

Mistletoe is a plant whose extracts are commonly used as a complementary therapy for cancer patients in parts of Europe. These extracts are usually given by injection under the skin and are studied for their potential to support cancer treatment. While few side effects have been reported, mistletoe extracts are not approved by the U.S. Food and Drug Administration (FDA) as a cancer treatment.

Mistletoe lectin is a substance made from the mistletoe plant that is being studied as a possible treatment for cancer. It is a complex molecule that can attach to cells and cause changes. Mistletoe extracts containing lectins are commonly used in some European countries but are not approved for cancer treatment in the United States. Patients should discuss its use with their care team to understand what it might mean for their care.

Mithracin, also known as mithramycin or plicamycin, is a drug once used to treat some types of testicular cancer and high calcium levels in the blood. It works by binding to DNA and stopping cells from making RNA and proteins. Although no longer widely produced, it remains a term you might see in medical records or research. Always ask your care team how it relates to your care.

Mithramycin, also known as Mithracin or Plicamycin, is a drug once used to treat certain cancers like testicular cancer and conditions such as high calcium levels in the blood. It works by attaching to DNA and stopping cells from making RNA and proteins, which can slow or stop cancer cell growth. Although it is no longer widely produced, you might still see this term in medical records or research.

To mitigate means to make something less severe, painful, or harmful. In cancer care, it often refers to steps taken to reduce side effects, symptoms, or risks associated with treatment or the disease itself. Patients and caregivers should always ask their care team how mitigation applies to their specific situation rather than assuming it is a treatment or diagnosis on its own.

Mitochondria are tiny parts inside cells that produce most of the energy cells need to work. They have their own DNA and play important roles in cell health and survival. In cancer care, mitochondria are sometimes discussed in relation to special diets or therapies aimed at supporting energy, inflammation, digestion, and immune health, but these approaches are not part of standard treatment and should be discussed with your healthcare team.

Mitochondrial Metabolic Therapy is a diet or nutrition approach discussed in cancer care for supporting nutrition, metabolism, inflammation, digestion, immune health, and treatment tolerance. It is sometimes mentioned as an alternative or complementary therapy but is not part of standard cancer treatment. Patients should always talk with their healthcare team before trying it.

Mitoguazone Dihydrochloride is a substance studied for treating certain blood cancers like leukemias and lymphomas. It works by blocking cell growth and may help kill cancer cells. If you see this term, it’s important to talk with your care team about what it means for your specific situation rather than assuming it is a diagnosis or treatment plan.

Mitolactol is a type of anticancer drug known as an alkylating agent. These drugs work by interfering with the DNA of cancer cells, which can help stop their growth. Mitolactol may be mentioned in cancer treatment plans or drug information. Understanding this term can help patients and caregivers better follow discussions about chemotherapy options.

Mitomycin is a chemotherapy drug used to treat certain cancers, including stomach, pancreatic, and some urinary tract cancers. It works by damaging cancer cells’ DNA to stop their growth. Mitomycin is sometimes given directly into the urinary tract or bladder. It is important to talk with your care team about how mitomycin fits into your specific treatment plan.

Mitosis is the natural process where a single cell divides to make two identical new cells. Cancer grows when cells divide uncontrollably, so some cancer drugs work by interfering with mitosis to slow or stop tumor growth. If you see the word mitosis in your care, ask your healthcare team how it relates to your specific situation rather than treating it as a diagnosis or treatment by itself.

Mitotane is a medication used to treat a rare cancer of the adrenal glands called adrenocortical carcinoma and certain hormone-related conditions like Cushing's syndrome. It works by slowing hormone production and affecting adrenal gland cells. Patients taking mitotane need regular monitoring for side effects and hormone levels, and should discuss how it applies to their care with their healthcare team.

Mitotic activity refers to how often cells in a tissue are dividing. Cancer tissues usually have more mitotic activity than normal tissues because cancer cells grow and multiply faster. For patients and caregivers, it’s important to understand this term in context and ask the healthcare team how it relates to their specific situation, rather than seeing it as a diagnosis or treatment decision on its own.

The mitotic cycle, also called the cell cycle, is the natural process cells follow to grow and divide into two new cells. It involves copying chromosomes and cell parts before splitting. In cancer, this cycle is important because cancer cells divide uncontrollably. Some treatments work by targeting cancer cells during specific parts of this cycle to help stop or slow their growth.

The mitotic index is a measure of how many cells in a tissue are actively dividing. In cancer, this number may be higher than normal, showing how quickly the tumor cells are growing. For patients and caregivers, it’s important to understand this term in context and discuss with the care team what it means for the individual’s diagnosis and treatment.

Mitotic inhibitors, also called antimitotic agents, are cancer drugs that work by stopping cells from dividing. Since cancer grows when cells multiply too quickly, these drugs help slow or stop tumor growth. You might hear this term during discussions about chemotherapy or treatment plans. Understanding mitotic inhibitors can help you follow your care and ask questions about your treatment options.

Mitotic Rate (MR) measures how quickly cancer cells are dividing in a tumor. It helps doctors understand how aggressive the cancer might be, especially in melanoma (a type of skin cancer). A higher mitotic rate often means the cancer is growing faster and may be linked to a lower chance of survival. This number is one of several factors used to stage cancer and guide treatment decisions.

Mitoxantrone hydrochloride is a chemotherapy drug used with other medicines to treat certain cancers, including acute non-lymphocytic leukemia and advanced prostate cancer that no longer responds to hormone therapy. It works by damaging cancer cells’ DNA to stop their growth. It may also help reduce immune system damage in some conditions. Always talk with your care team about how this drug might apply to your treatment.

Mivobulin Isethionate, also known as CI-980, is a cancer drug that works by blocking cell division. It belongs to a group called mitotic inhibitors, which aim to slow or stop the growth of cancer cells. This drug may be used in certain treatment plans or clinical trials, depending on the patient’s specific cancer and situation.

Mixed germ cell tumors are rare cancers made up of two or more types of germ cell tumors. They most often develop in the ovaries or testicles but can also appear in other parts of the body like the chest, abdomen, or brain. These tumors involve cells that normally form sperm or eggs. Understanding the specific tumor makeup and location is important for treatment decisions.

A mixed glioma is a brain tumor made up of more than one type of glial cell, usually astrocytes and oligodendrocytes. These tumors often grow slowly, especially when low-grade, and treatment may involve early surgery to remove or reduce the tumor, sometimes followed by chemotherapy or radiation. Monitoring and watchful waiting can be options, particularly for younger patients, but early treatment is often recommended to lower the chance of the tumor becoming more aggressive.

A Mixed Neuronal-Glial Tumor, also called a Glioneuronal Tumor, is a rare growth made up of nerve cells and supporting brain cells. Most of these tumors are not cancer and tend to grow slowly. They can occur anywhere in the brain or spinal cord and are more common in children and young adults. It’s important to ask your care team what this diagnosis means for your specific situation.

MK-0646, also called anti-IGF1R recombinant monoclonal antibody MK-0646, is an experimental lab-made protein being studied to treat some cancers. It works by attaching to a protein called IGF1R on cancer cells, which helps them grow. By blocking this protein, MK-0646 may slow cancer growth or cause cancer cells to die. It is not yet an approved standard treatment and is mainly available through clinical trials.

MK0752 is a substance being studied as a possible treatment for cancer. It works by blocking signals that help cancer cells grow and may help kill these cells. If you see this term, it’s important to talk with your care team about what it means for your specific situation rather than assuming it is a diagnosis or treatment plan.

mL (milliliter), also called cc or cubic centimeter, is a unit used to measure volume. In cancer care, you may see mL when discussing amounts of fluids, medicines, or substances in tests or treatments. The term can also appear in names of experimental cancer treatments or genes related to cancer. It’s important to ask your care team what mL means in your specific situation rather than assuming it refers to a diagnosis or treatment.

The MLH1 gene helps fix mistakes in DNA when cells divide. Changes (mutations) in this gene can cause DNA errors to build up, which may lead to abnormal cell growth and cancer. MLH1 mutations are linked to inherited conditions like Lynch syndrome and Muir-Torre syndrome, which increase cancer risk. It’s important to understand MLH1 in the context of your personal health and ask your care team how it relates to your situation.

MLN1202 is an experimental medicine called an anti-CCR2 monoclonal antibody. It is being studied for its potential to help treat cancers that spread to the bones by targeting a protein called CCR2 found on certain bone, immune, and cancer cells. MLN1202 is not yet a standard treatment and is usually discussed in the context of clinical trials or research.

MLN2704, also called MLN591DM1, is an experimental drug being studied for treating prostate cancer and cancers that have spread to the bone. It belongs to a group of medicines known as antibody drug conjugates. If you see this term in your medical records or discussions, it’s important to ask your healthcare team what it means for your specific care, rather than assuming it is a diagnosis or treatment recommendation.

MLN518, also known as CT53518 or Tandutinib, is a drug being studied for treating some types of cancer. It works by blocking enzymes that help cancer cells grow and may also stop tumors from forming new blood vessels they need to survive. This drug is still experimental and not yet a standard treatment. Patients may see these names in medical reports or clinical trial information and should ask their care team what it means for their care.

MLN591DM1, also known as MLN2704, is an experimental drug being studied for prostate cancer and cancers that have spread to the bones. It belongs to a group called antibody drug conjugates, designed to deliver cancer-fighting medicine directly to cancer cells. It is not yet an approved treatment, so patients should ask their care team how it relates to their specific care.

Malignant Mixed Müllerian Tumor (MMMT) is a rare type of cancer that contains two kinds of cancer cells: carcinoma, which comes from the lining of organs, and sarcoma, which comes from connective tissues. MMMT most often starts in the uterus. Because it has features of both cancer types, diagnosis and treatment can be more complex than for other cancers.

Mmol, short for millimole, is a unit used to measure the amount of a substance in a sample, equal to one-thousandth of a mole. You may see mmol in lab test results or medical reports related to blood levels of chemicals like creatine, phosphate, or glutathione. It’s important to understand mmol values in context and ask your care team what they mean for your specific health situation.

MMR deficiency (also called dMMR or mismatch repair deficiency) means certain cells have trouble fixing mistakes made when DNA is copied. This can cause many DNA mutations and may increase the risk of cancer. It is most often found in colorectal, gastrointestinal, and endometrial cancers. Knowing if a tumor has MMR deficiency can help doctors plan treatment and predict how well it might respond.

MMS (Miracle Mineral Solution) is a product that creates chlorine dioxide, a chemical used industrially for disinfecting and bleaching. It has been promoted as a treatment for cancer and other diseases, but health authorities have not approved it for medical use. Drinking MMS can cause serious side effects, including nausea, vomiting, dehydration, and low blood pressure. Major agencies warn against its use due to safety risks.

MOA stands for Mechanism of Action. It explains how a cancer treatment works in the body, such as targeting cancer cells, blocking growth signals, or helping the immune system attack tumors. Understanding MOA can help patients and caregivers better grasp why a treatment is used and what effects it may have.

MOAB Ch14.18, also called dinutuximab or Ch14.18, is a medicine used to treat children with high-risk neuroblastoma, a cancer that starts in nerve cells. It works by attaching to a molecule called GD2 on cancer cells, helping the immune system find and attack them. It is given after other treatments have helped shrink the cancer and is part of a combination therapy to reduce the chance of the cancer returning.

MoAb Hum195, also called lintuzumab, is an experimental monoclonal antibody developed to treat certain blood cancers like acute myeloid leukemia (AML). It targets a protein called CD33 found on many leukemia cells to help the immune system attack them. Lintuzumab has been studied in clinical trials but is not a standard treatment.

Mocetinostat, also called MGCD0103, is an experimental cancer drug studied mainly for blood cancers like lymphoma and leukemia. It belongs to a group of medicines called histone deacetylase (HDAC) inhibitors, which work by changing how genes are turned on or off inside cells. Mocetinostat is not yet a standard treatment but is being tested in clinical trials for several cancers.

Modafinil is a prescription medicine that helps promote wakefulness and reduce excessive daytime sleepiness. It is approved for conditions like narcolepsy, sleep apnea-related sleepiness, and shift work sleep disorder. In cancer care, modafinil has been studied as a possible option to help with cancer-related fatigue and concentration problems, but it is not a standard treatment for these symptoms.

In cancer care, a modality is a specific type or method of treatment, such as surgery, chemotherapy, radiation therapy, immunotherapy, targeted therapy, or hormone therapy. Treatment plans may use one modality alone or combine several to attack cancer in different ways and improve outcomes. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Moderate sedation, also called conscious sedation, is a medical method that helps you relax and feel comfortable during procedures. You stay awake or lightly sleepy, can respond to questions, and breathe on your own. It’s often used in cancer care for biopsies, endoscopies, and other tests or treatments to reduce anxiety and discomfort while keeping you safe.

Modified Citrus Pectin (MCP) is a dietary supplement made from citrus fruit fiber that has been processed into smaller pieces to be absorbed by the body. It is studied for its potential to block a protein called galectin-3, which may play a role in cancer growth and spread. While some lab and early human studies suggest possible effects, MCP is not an approved cancer treatment.

Modified Citrus Pectin (MCP) is a dietary supplement made from citrus fruit fiber that has been processed into smaller pieces to be absorbed by the body. It is studied for its potential to block a protein called galectin-3, which may play a role in cancer growth and spread. While some lab and early human studies suggest possible effects, MCP is not an approved cancer treatment.

Modified FOLFOX-6 (mFOLFOX6) is a chemotherapy treatment used mainly for colorectal and some other gastrointestinal cancers. It combines three drugs—oxaliplatin, leucovorin, and fluorouracil (5-FU)—given through a vein in cycles, often every two weeks. This regimen may be used before or after surgery or for advanced cancer. Common side effects include fatigue, nausea, low blood counts, diarrhea, and nerve-related symptoms from oxaliplatin.

Modified FOLFOX-6 (mFOLFOX6) is a chemotherapy treatment mainly used for colorectal and some other digestive system cancers. It combines three drugs—oxaliplatin, leucovorin, and fluorouracil (5-FU)—given through a vein in cycles, often every two weeks. It may be used before or after surgery or for advanced cancer. Common side effects include fatigue, nausea, low blood counts, diarrhea, and nerve symptoms from oxaliplatin.

A Modified Ketogenic Diet is a high-fat, low-carbohydrate eating plan that encourages the body to use fat for energy instead of carbohydrates. It is less strict than the classic ketogenic diet and easier to follow. In cancer care, it is being studied for its possible effects on cancer metabolism and treatment support, but it is not an established cancer treatment.

A modified radical hysterectomy is surgery to remove the uterus, cervix, part of the surrounding tissues, and upper vagina. It is used mainly to treat certain early-stage cervical and uterine cancers. This surgery is more extensive than a simple hysterectomy but less so than a radical hysterectomy. Nearby lymph nodes may also be removed to check if cancer has spread.

A modified radical mastectomy is surgery to remove the entire breast affected by cancer, including the nipple, areola, skin, most lymph nodes under the arm, and sometimes the lining over chest muscles. It helps check if cancer has spread and is one of several types of mastectomy used to treat or reduce the risk of breast cancer. Unlike lumpectomy, it removes the whole breast rather than just the tumor.

Modified radical vulvectomy, also called partial radical vulvectomy, is surgery to remove most—but not all—of the vulva, which includes the external female genital organs like the vaginal lips and the opening to the vagina. The clitoris may be spared. Sometimes, lymph nodes in the groin are also removed to check for cancer spread. This surgery is a treatment option for vulvar cancer and aims to remove cancer while preserving as much normal tissue as possible.

To modulate means to adjust or change something. In cancer care, this term often relates to how treatments like radiation therapy are carefully adjusted to target tumors precisely while protecting healthy tissues. Patients should ask their care team how modulation applies to their specific treatment plan rather than assuming it refers to a diagnosis or a fixed treatment.

The Moerman Diet is an alternative cancer diet developed by Dutch practitioner Cornelis Moerman. It is a strict vegetarian plan that excludes many foods like meats, fish, alcohol, and certain vegetables. There is no scientific evidence that it cures cancer, and it is considered a form of quackery by medical experts. Patients should discuss any diet changes with their care team before use.

Mogamulizumab, also known by the brand name Poteligeo, is a type of medicine called a monoclonal antibody. It is used to treat certain types of cutaneous T-cell lymphoma, including mycosis fungoides and Sézary syndrome, especially when other treatments have not worked. Mogamulizumab works by targeting a protein called CCR4 on some cancer cells, helping the immune system to attack and kill these cells.

Mohs micrographic surgery, also called Mohs surgery, is a precise surgical technique used to treat high-risk nonmelanoma skin cancers in sensitive or cosmetically important areas like the face, ears, scalp, neck, hands, feet, and genitalia. It removes the cancer layer by layer, checking each layer under a microscope to preserve as much healthy tissue as possible while ensuring complete cancer removal.

Mohs surgery, also called Mohs micrographic surgery, is a precise technique used to remove certain skin cancers, especially in sensitive areas like the face, ears, hands, and genitals. It removes the cancer layer by layer, checking each layer under a microscope during the procedure to save as much healthy skin as possible while ensuring all cancer is gone.

A moist reaction is a skin problem caused by radiation therapy, often appearing in skin folds like under the breasts, behind the ears, or on the buttocks. The skin becomes moist, painful, and may peel or develop sores. This reaction usually improves within a few weeks after radiation ends. Patients should discuss what this means for them with their care team rather than assuming it is a diagnosis or treatment plan.

Data G Health Strategy, also called MOJO Healing Strategy, is a program combining tests, supplements, lifestyle changes, medications, coaching, and clinic services related to cancer care. It is discussed in cancer prevention, treatment support, symptom relief, recovery, and survivorship. This entry is informational and not a recommendation to use the protocol.

A molar pregnancy, also called a hydatidiform mole, is an unusual pregnancy where abnormal tissue grows inside the uterus instead of a normal fetus. It often looks like a cluster of fluid-filled sacs. Most molar pregnancies are not cancer, but some can grow into invasive tumors or rare cancers related to pregnancy tissue. If you see this term, ask your care team what it means for your health and treatment.

Mold is a type of fungus that can grow indoors and outdoors. Some molds produce toxins, like aflatoxin, which may increase the risk of liver cancer. In cancer care, understanding mold and related allergens helps patients and caregivers ask informed questions and manage symptoms safely. It’s important to discuss with your healthcare team how mold or mold-related terms apply to your personal health, rather than assuming they indicate a diagnosis or treatment plan.

A mole, also called a nevus, is a common, usually harmless growth on the skin made up of pigment cells. Most people have between 10 and 40 moles, which can be flat or raised and vary in color from pink to brown. Some moles, called dysplastic or atypical nevi, look different and may have a higher risk of developing into melanoma, a serious type of skin cancer.

Molecular characterization is a type of testing that looks closely at the genetic makeup of cancer cells. It helps doctors find specific changes in the tumor’s DNA or RNA, such as gene mutations or patterns of gene activity. This information can guide diagnosis and treatment decisions. Some programs, like the Molecular Characterization Initiative, offer free testing for children and young adults with certain new cancers.

Molecular diagnosis is a way doctors study the molecules inside cancer cells, like DNA and RNA, to better understand the cancer. This helps them identify the cancer type and choose treatments that might work best. For patients and caregivers, it’s important to ask the care team how molecular diagnosis applies to their specific situation rather than seeing it as a diagnosis or treatment by itself.

Molecular diagnostics are lab tests that study molecules like DNA, RNA, and proteins in a sample to help find diseases such as cancer. These tests can guide treatment choices, check if cancer has returned, or see how well treatment is working. They often use methods like PCR to detect tiny changes in genes, offering less invasive ways to understand a patient’s condition.

A molecular marker, also called a biomarker or signature molecule, is a molecule found in blood, tissues, or body fluids that signals a normal or abnormal process, such as cancer. Testing for molecular markers helps doctors understand the unique features of a person’s cancer and can guide treatment choices, including targeted therapies. It is important to discuss what molecular marker results mean for your specific care with your healthcare team.

Molecular mass, also called molecular weight, is the total mass of all atoms in a molecule. It helps describe the size of molecules, such as proteins or drugs, and is measured using units like daltons (Da) or kilodaltons (kDa). Patients may see this term in medical reports or research about cancer treatments, especially when discussing molecules involved in cancer growth or targeted therapies.

Molecular medicine is a field of medicine that studies how genes, proteins, and molecules in cells can change in diseases like cancer. It helps doctors understand disease better and develop new ways to diagnose and treat it. For patients, it’s important to ask your care team how molecular medicine relates to your specific situation rather than assuming it means a certain diagnosis or treatment.

A molecular pathway is a series of actions among molecules inside a cell that leads to a specific function or result. In cancer care, certain drugs target these pathways to help control cancer growth. For example, some breast cancers with specific markers may respond better to drugs that block the PI3K/AKT pathway. It’s important to ask your care team how molecular pathways relate to your individual diagnosis and treatment.

Molecular profiling, also called biomarker testing or molecular testing, is a lab test that looks for specific genes, proteins, or molecules in cancer cells. It helps doctors understand the unique features of your cancer and choose treatments that may work best for you. This testing is different from inherited genetic testing and is often used for people with solid tumors or blood cancers.

Molecular radiation therapy, also called targeted radionuclide therapy, is a type of cancer treatment that uses radioactive chemicals linked to molecules that specifically target cancer cells. This approach aims to deliver radiation directly to cancer cells, such as those in prostate cancer, while reducing damage to normal tissues. Patients may see this term in medical reports or treatment discussions and should ask their care team how it applies to their situation.

Molecular risk assessment is a test that looks at specific biological markers, such as changes in tumor DNA, to estimate a person’s chance of developing cancer. It helps doctors understand risk but is not a diagnosis or treatment plan by itself. Patients should discuss what the results mean for their individual situation with their care team.

Molecular subtype refers to smaller groups within a type of cancer, identified by specific genetic changes or proteins on cancer cells. Knowing the molecular subtype helps doctors plan treatment, monitor how well it works, and understand the likely course of the disease. For example, breast cancer subtypes include those with estrogen, progesterone, or HER2 receptors. Patients should discuss what their molecular subtype means for their care with their healthcare team.

A molecular target is a specific gene, protein, or molecule involved in cancer growth and spread that can be blocked by certain treatments. These targeted therapies aim to stop cancer cells from growing or spreading by focusing on these molecular targets. Testing your tumor for these targets helps doctors decide if targeted therapy might be an option for you.

Molecular testing, also called biomarker testing or molecular profiling, is a lab test that looks for specific genes, proteins, or other molecules in cancer cells. It helps doctors understand the unique features of a person’s cancer and can guide treatment choices, especially for cancers that have spread or returned. This testing is different from genetic tests that check inherited cancer risks.

Molecular weight (also called molecular mass) is the total mass of all atoms in a molecule. It helps describe the size of molecules, such as medicines or proteins. In cancer care, understanding molecular weight can be important when doctors discuss certain drugs or lab tests. The terms molecular weight, molecular mass, and molar mass are often used interchangeably in everyday language, though they have slightly different scientific meanings.

Molecularly targeted therapy, also called targeted therapy, is a cancer treatment that uses drugs or substances designed to attack specific molecules in cancer cells. These therapies aim to stop cancer cells from growing and spreading while causing less harm to normal cells. Your doctor may recommend targeted therapy based on tests that find specific targets in your tumor.

A molecule is the smallest part of a substance that keeps its chemical properties. In cancer care, molecules are important because some treatments and imaging tests target specific molecules in cancer cells. Understanding the role of molecules can help patients and caregivers ask the right questions about diagnosis, treatment, and advanced imaging options.

Momelotinib dihydrochloride monohydrate, also known as Ojjaara, is a medicine approved to treat adults with certain types of myelofibrosis, a bone marrow disease. It is used for intermediate- or high-risk cases where anemia is present. This drug works by blocking proteins that help abnormal blood cells grow, which may help control the disease.

Mometasone furoate is a medicine used as a cream or nasal spray to reduce inflammation. It treats skin conditions like eczema and allergy-related sinus problems. Known by brand names such as Elocon and Nasonex, it is sometimes used in cancer care to help ease skin irritation caused by radiation therapy. It is not a cancer treatment but a supportive medication to manage symptoms and side effects.

To monitor in medicine means to regularly watch and check a person’s health or a medical condition to see if it changes. In cancer care, monitoring often involves tests like CT scans or blood tests to track how the disease or treatment is progressing. Monitoring helps doctors decide if treatments are working or if changes are needed.

Monjuvi (tafasitamab) is a cancer medicine used with lenalidomide to treat adults with certain types of diffuse large B-cell lymphoma that have returned or not responded to prior treatments. It is also used with lenalidomide and rituximab for follicular lymphoma. Monjuvi is a monoclonal antibody that helps the immune system target cancer cells. It may appear under related names like tafasitamab.

Monk’s pepper, also known as chaste tree berry or Vitex, is an herbal extract made from the fruit of the chaste tree found in parts of Asia and Europe. It is often used to help with menstrual symptoms and fertility concerns. Because it may affect hormone levels, it’s important to tell your healthcare team if you use it, especially during cancer care.

Mono-Fruit Detox Diets involve eating only one type of fruit for a period, often promoted to support nutrition, digestion, or reduce inflammation. In cancer care, these diets are sometimes discussed for their potential effects on metabolism, immune health, or treatment tolerance. However, they are not proven cancer treatments and should be used cautiously under medical supervision.

Monoamine oxidase inhibitors (MAO inhibitors or MAOIs) are antidepressant medications that help improve mood by blocking an enzyme in the brain. This enzyme normally breaks down chemicals that affect mood, such as serotonin and dopamine. MAO inhibitors may be used in cancer care to help manage depression or anxiety related to diagnosis or treatment.

Monoclonal antibodies are lab-made proteins designed to attach to specific targets, such as cancer cells. They can help the immune system find and destroy cancer or carry medicines directly to cancer cells. Side effects vary by person and treatment type, and doctors cannot always predict when or how serious they will be.

Monoclonal Antibody Ch14.18, also called dinutuximab or Unituxin, is a targeted cancer drug that attaches to a substance called GD2 found on some cancer cells. It is mainly used to help treat children with high-risk neuroblastoma after other treatments have helped shrink the cancer. This medicine works by helping the immune system attack cancer cells.

Monoclonal Antibody Hum195, also known as lintuzumab or MoAb HuM195, is a laboratory-made antibody studied as a treatment for certain blood cancers like acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS). It works by targeting a protein called CD33 on cancer cells to help the immune system attack them. It is still considered experimental and is not a standard treatment.

Monoclonal B-Cell Lymphocytosis (MBL) is a condition where there are more identical B cells than usual in the blood. B cells help the immune system fight infections. MBL is not cancer but can sometimes lead to blood cancers like chronic lymphocytic leukemia (CLL). It is often found by chance and usually requires regular monitoring rather than treatment.

Monoclonal gammopathy of undetermined significance (MGUS) is a condition where small amounts of an abnormal protein called M Protein are found in the blood without causing symptoms or disease. MGUS does not require immediate treatment but needs regular monitoring because it can increase the risk of developing certain blood cancers over time.

Monoclonal protein, also called M Protein, is an abnormal antibody made in large amounts by certain plasma cell cancers like multiple myeloma. Some people have small amounts without symptoms, a condition called MGUS, which needs monitoring but not treatment. Doctors measure M Protein in blood or urine to help diagnose, track, and manage these diseases.

Monocytes are a type of white blood cell made in the bone marrow that help your immune system fight infections and clean up damaged cells. In cancer care, doctors check monocyte levels through blood tests to understand your immune health and guide treatment decisions. Seeing the term monocyte in your medical information is common and does not by itself mean there is a problem.

Monogamous describes a relationship where a person has only one partner at a time. In humans, this can mean living together, sharing resources, and being sexually exclusive. The idea of monogamy varies across cultures and may include lifelong or serial partnerships. For patients, understanding how this term applies personally is important rather than assuming it relates directly to medical care.

A monomer is a small molecule that can join with other identical molecules to form a larger structure called a polymer. In simple terms, monomers are the building blocks that link together to create complex materials. If you see the word monomer in your medical information, it’s important to ask your care team how it relates to your specific situation rather than assuming it refers to a diagnosis or treatment.

Monotherapy is a treatment approach that uses only one type of therapy or medication to treat a disease. In cancer care, this often means using a single drug rather than combining multiple drugs. Monotherapy may be chosen when one treatment is enough to manage the condition or to avoid side effects from multiple medications.

Montanide ISA-51, also called Incomplete Freund's Adjuvant (IFA), is a mixture of oil and water used to help boost the immune system’s response to specific substances called antigens. It is studied in cancer care as part of immunotherapy and cancer vaccines to help the body better recognize and fight cancer cells. Patients may see this term in treatment plans or clinical trial information and should ask their care team how it applies to their situation.

Montelukast sodium, also known as Singulair, is a medicine used to help manage asthma symptoms like trouble breathing, wheezing, coughing, and a tight chest. It works by blocking substances that cause the airways in the lungs to narrow. Patients may see this name in medical reports or treatment plans, and it’s important to ask your care team how it relates to your specific health situation.

MOPP is a chemotherapy treatment used mainly for Hodgkin lymphoma. It combines four drugs—mechlorethamine, vincristine (Oncovin), procarbazine, and prednisone—that work together to kill cancer cells. Patients may see the term MOPP or MOPP regimen in medical reports or treatment plans. It’s important to discuss with your care team how this treatment applies to your specific situation.

MOPP is a chemotherapy treatment combining four drugs—mechlorethamine, vincristine (Oncovin), procarbazine, and prednisone—mainly used to treat Hodgkin lymphoma. It may appear as MOPP or MOPP regimen in medical records. It’s important to ask your care team how this treatment applies to your specific situation rather than assuming what it means on its own.

Morab-009, also called amatuximab, is an experimental lab-made protein being studied to treat mesothelioma, a cancer of the lining around the lungs or abdomen. It targets a protein called mesothelin found on some cancer cells, potentially helping the immune system attack them. Morab-009 is not yet a standard treatment and is mainly available through clinical trials.

In cancer care, the term "moral" often relates to ethical beliefs about right and wrong behavior. It can also appear as "ethical." Understanding this helps patients and caregivers recognize that discussions about alcohol use or addiction are about health, not judgment. Doctors consider alcohol use because it can affect test results, treatment choices, and recovery. If you see this term, ask your care team what it means for your care.

Morbidity refers to having a disease or medical problem, including side effects or complications caused by treatment. In cancer care, it helps describe health issues a person may have alongside cancer or problems that arise during treatment. Understanding morbidity can help patients and caregivers ask informed questions about overall health and treatment risks.

Morinda citrifolia, also known as noni, is a tropical fruit-bearing tree related to coffee plants. Its fruit and extracts are sometimes used in traditional medicine and are being studied for possible cancer-related uses. However, products made from noni may carry risks, such as liver problems. Patients should discuss any noni use with their care team to understand its relevance and safety in their care.

Moringa is a fast-growing tree known as the “miracle tree” for its many nutrients and potential health benefits. Research shows that extracts from its leaves, bark, and seeds may help kill cancer cells while protecting healthy tissue. Patients should discuss moringa with their care team to understand its role in their specific cancer care, rather than seeing it as a standalone treatment.

Morphine sulfate is a pain-relieving medicine made from the opium poppy plant. It works by attaching to opioid receptors in the brain and body to block pain signals. It is often used to treat moderate to severe pain, including pain caused by cancer or its treatment. Morphine can also help reduce shortness of breath. Patients should always ask their care team how morphine sulfate applies to their specific situation.

Morphology is the study of the shape and structure of cells, tissues, or organisms. In cancer care, it helps doctors understand how cancer cells look under a microscope, which can influence diagnosis and treatment decisions. Patients should always ask their care team what specific morphology terms mean for their individual situation rather than assuming a diagnosis or treatment plan based on the word alone.

Mortality means death or the rate of death in a group of people over a certain time. In cancer care, all-cause mortality counts deaths from any cause, not just cancer. Understanding mortality helps patients and caregivers see how cancer and treatments affect overall survival. It’s important to discuss what mortality numbers mean for each person with the care team, rather than assuming they predict individual outcomes.

Mosaic Down syndrome is a form of Down syndrome where only some of the body’s cells have an extra copy of chromosome 21. People with this condition may have similar physical features and health or learning challenges as others with Down syndrome, but the effects can vary depending on how many cells carry the extra chromosome. It’s important to understand this term in context and discuss its meaning with your care team for individual guidance.

Mosaicism is a condition where some cells in the body have different genetic information than others. This happens because of changes during cell division, either before or after birth. Mosaicism may or may not cause health problems. In cancer care, it can be important because certain types of mosaicism, such as those involving sex chromosomes, may increase the risk of tumors in reproductive organs. Always ask your care team how mosaicism relates to your personal health.

Mosunetuzumab, sold as Lunsumio, is an immunotherapy drug used to treat adults with follicular lymphoma that has returned or not improved after at least two other treatments. It works by helping the immune system’s T cells find and kill lymphoma cells. Mosunetuzumab is a bispecific T-cell engager (BiTE) approved by the FDA for this use.

Motexafin gadolinium, also called gadolinium texaphyrin, is a substance studied in cancer care. It can build up in some cancer cells, potentially making them easier to treat with radiation or chemotherapy. It is also used as a contrast agent in MRI scans to help doctors find cancer cells by making tumors clearer on images.

Motexafin Lutetium, also called Lutetium Texaphyrin, is a drug being studied for cancer treatment using photodynamic therapy. This approach uses light to activate the drug and target cancer cells. It is not yet a standard treatment but may appear in clinical trials or research discussions. Patients should ask their care team how this term relates to their specific care.

In medicine, "motor" refers to movement or the ability to move parts of the body. In cancer care, understanding motor functions is important because brain tumors or other brain conditions can affect movement and require specific treatments. If you see the term "motor" in your medical information, ask your care team how it relates to your symptoms or treatment, rather than assuming it is a diagnosis or treatment by itself.

Motor neuron disease (MND) is a group of disorders where nerve cells controlling muscle movement break down. This causes muscle weakness, twitching, and difficulty with activities like speaking, walking, and swallowing. Symptoms can start at birth or develop later. There are no approved cures for most MNDs, so care focuses on managing symptoms. If you see this term, ask your care team what it means for you or your loved one specifically.

Motrin is a brand name for ibuprofen, a common medicine used to reduce pain, fever, swelling, and redness. It belongs to a group called nonsteroidal anti-inflammatory drugs (NSAIDs). Motrin, Advil, and ibuprofen all refer to the same medicine. In cancer care, it may be used to help manage symptoms like pain or inflammation, but it is not a treatment for cancer itself.

A mouse model is a special type of mouse used by researchers to study human diseases, including cancer. These mice are bred or genetically modified to mimic certain human conditions, helping scientists learn how diseases develop and test new treatments. For patients and caregivers, it’s important to understand that findings from mouse models may not directly apply to every person and should be discussed with the healthcare team.

Pilates and related movement disciplines are gentle exercise methods that focus on improving strength, flexibility, posture, and recovery. In cancer care, these approaches may be used to help manage symptoms, support recovery after surgery or chemotherapy, improve quality of life, and assist with treatment tolerance. They are considered complementary or supportive and should be discussed with your healthcare team before starting.

Moxibustion is a traditional Chinese medicine technique that uses heat from burning an herb called mugwort near the skin to warm and stimulate specific points on the body. It is sometimes used alongside acupuncture to help manage symptoms related to cancer or its treatment, such as pain or nausea. Moxibustion is a complementary therapy and not a replacement for standard cancer treatments.

Moxifloxacin Hydrochloride, also known as Avelox, is an antibiotic used to treat bacterial infections. In cancer care, it helps prevent or treat infections when the immune system is weakened by treatments like chemotherapy. It is not a cancer treatment but supports overall care by managing infections that could complicate cancer therapy.

Mozobil, also called AMD 3100 or plerixafor, is a medicine used to help move special blood-forming stem cells from the bone marrow into the bloodstream. This makes it easier to collect these cells for patients with certain cancers, like non-Hodgkin lymphoma or multiple myeloma, who are preparing for a stem cell transplant. It is usually given with another medicine called G-CSF to improve stem cell collection.

Amuvatinib, also called MP470, is an experimental drug being studied to treat certain cancers. It works by blocking proteins that help cancer cells grow and repair their DNA, which may make cancer cells more sensitive to chemotherapy and radiation. It is not yet a standard treatment and is used mainly in clinical trials under medical supervision.

The MPL gene helps control blood cell production in the bone marrow, especially platelets. Changes (mutations) in this gene can lead to abnormal blood cells or too many platelets. These mutations are linked to certain blood conditions like essential thrombocythemia and primary myelofibrosis. If you see 'MPL gene' mentioned, it’s important to ask your care team what it means for your specific situation.

Malignant Peripheral Nerve Sheath Tumor (MPNST) is a rare cancer that starts in the protective covering of nerves outside the brain and spinal cord. It is a type of soft tissue sarcoma that can affect nerve function and usually requires care from specialists familiar with nerve tumors. It may also appear under related names such as Malignant Peripheral Nerve Sheath Tumor.

MR, or Mitotic Rate, measures how quickly cancer cells are dividing and growing. It is often used to help stage cancers like melanoma. Higher MR values are linked with lower survival rates. Patients should understand MR in the context of their overall diagnosis and treatment plan and discuss its meaning with their care team.

MRA, or magnetic resonance angiography, is a medical imaging test that uses magnets and radio waves to create detailed pictures of blood vessels and blood flow. It helps doctors see if blood vessels near tumors are affected or to plan surgeries and treatments. Patients should ask their care team how MRA results relate to their specific situation rather than assuming it means a diagnosis or treatment plan.

MRCP (Magnetic Resonance Cholangiopancreatography) is a safe, painless imaging test that uses magnets and radio waves to create detailed pictures of the liver, bile ducts, gallbladder, pancreas, and pancreatic duct. It helps doctors find problems like blockages, inflammation, or tumors without inserting instruments into the body. It may also appear under related names such as Magnetic Resonance Cholangiopancreatography.

Measurable residual disease (MRD), also called minimal residual disease, means a very small number of cancer cells that remain in the body during or after treatment. These cells are too few to be seen with regular tests but can be found using highly sensitive lab methods. MRD testing is mainly used for blood cancers like leukemia and lymphoma to help doctors understand treatment response and the chance of cancer returning.

MRI, or Magnetic Resonance Imaging, is a painless imaging test that uses magnets, radio waves, and a computer to create detailed pictures of the inside of your body. It helps doctors see organs, soft tissues, and other structures clearly without using radiation. MRI is often used to diagnose diseases, plan treatments, and check how well treatments are working.

MRI ultrasound fusion-guided biopsy, also called fusion biopsy, is a procedure that combines MRI and ultrasound images to create a detailed 3-D view of the prostate. This helps doctors guide a needle to abnormal areas to collect tissue samples. It may find prostate cancer cells that other biopsies miss and can help plan treatment.

An MRI-guided biopsy is a procedure that uses MRI imaging to find and take a small tissue sample from an area that cannot be felt or seen on other scans. This sample is checked under a microscope to look for diseases like cancer. It is often used for areas in the breast or prostate. Patients should ask their care team how this test applies to their own situation.

Magnetic Resonance Lymphangiography (MRL) is a painless imaging test that uses magnets, radio waves, and a computer to create detailed pictures of the lymphatic system. A special dye is injected to highlight lymph vessels and nodes. MRL helps doctors check for blockages, leaks, or signs of cancer spread without using radiation.

Messenger RNA (mRNA) is a molecule inside cells that carries genetic instructions from DNA to help make proteins. It acts like a messenger delivering the information needed for protein production. Small molecules called microRNAs (miRNAs) can attach to mRNA and block protein production. Researchers study mRNA and miRNA to better understand and treat cancer. You may see mRNA mentioned in medical reports or tests related to cancer.

MRSA (Methicillin-Resistant Staphylococcus Aureus) is a type of bacteria that causes infections resistant to many common antibiotics. It often causes mild skin infections but can sometimes lead to serious health problems. People with weakened immune systems, such as those in hospitals or nursing homes, are more likely to get MRSA. It can also spread in community settings through close skin contact or shared items.

Magnetic Resonance Spectroscopic Imaging (MRSI) is a noninvasive scan that measures chemical activity inside cells. Often done with MRI scans, it helps doctors see not just the size and shape of tumors but also how tumor cells are working. This extra information can support diagnosis, treatment planning, and monitoring in cancer care.

MS 209 is a substance being studied to help cancer cells respond better to chemotherapy drugs when they have become resistant. It is a type of quinolone antibiotic. Patients may see this term in medical materials, but it is important to discuss with the care team how it relates to individual treatment rather than assuming it is a diagnosis or specific therapy.

MS-275, also known as BMS-275291, is an experimental drug being studied for treating blood cancers. It belongs to a group of drugs that may block enzymes cancer cells use to grow and spread. MS-275 is not yet a standard treatment and is mainly available through clinical trials. Patients should discuss with their healthcare team how this drug might relate to their care.

The MSH2 gene helps fix mistakes in DNA when cells divide. Changes in this gene can lead to errors building up, which may increase the risk of certain cancers, including inherited types like Lynch syndrome. Understanding MSH2 is important in some cancer diagnoses and genetic testing, but it is not a diagnosis by itself. Patients should discuss what MSH2 means for their individual care with their healthcare team.

The MSH6 gene helps fix mistakes in DNA when cells copy their genetic material. Changes (mutations) in this gene can cause errors to build up, which may lead to abnormal cell growth and cancer. MSH6 gene mutations are linked to inherited conditions like Lynch syndrome and Muir-Torre syndrome, which increase the risk of colorectal and other cancers. It’s important to discuss what MSH6 means for you with your care team rather than assuming it is a diagnosis or treatment plan.

MSI, or Microsatellite Instability, is a change in certain DNA sequences within cells, often found in some cancers like colorectal, stomach, and uterine cancers. It means the DNA has mutations in repeated sections called microsatellites. Knowing if a cancer has MSI can help doctors decide on the best treatment. If you see MSI mentioned in your reports, ask your care team what it means for your specific situation.

MSI-H cancer means cancer cells have many changes in short repeated DNA sequences called microsatellites. These cancers often have trouble fixing DNA copying mistakes. MSI-H is most common in colorectal, stomach, and endometrial cancers. Knowing if a cancer is MSI-H can help doctors choose treatments, including some immunotherapy options that may work better for these cancers.

MSSE, also called Ferguson-Smith Syndrome or Multiple Self-Healing Squamous Epithelioma, is a rare inherited condition caused by changes in the TGFBR1 gene. It leads to many fast-growing skin tumors that look like squamous cell skin cancer, often on the nose, face, ears, arms, and legs. These tumors usually heal on their own but can leave deep scars.

Maximum Tolerated Dose (MTD) is the highest dose of a medicine or treatment that patients can receive without causing side effects that are too severe or harmful. It helps doctors find a balance between giving enough medicine to work and keeping side effects manageable. Understanding MTD can help patients ask questions about their treatment and side effects.

mTOR (mechanistic target of rapamycin) is a protein in cells that helps control growth, division, and survival. It plays a key role in how cells grow and respond to signals. In some cancers, mTOR is more active than normal. Certain cancer drugs called mTOR inhibitors work by blocking this protein to slow or stop cancer growth. Understanding mTOR can help patients learn about targeted treatments.

mTOR inhibitors are medicines that block a protein called mTOR, which helps control cell growth and division. By blocking mTOR, these drugs may slow or stop cancer cells from growing. Some mTOR inhibitors are used to treat certain cancers, while others are still being studied in clinical trials. It’s important to ask your care team how mTOR inhibitors relate to your specific treatment.

Muir-Torre syndrome (MTS) is a rare inherited condition that causes tumors to form in oil glands of the skin and in certain internal organs, often the colon or urinary tract. These tumors can be benign or cancerous. MTS is linked to changes in specific genes and is considered a type of Lynch syndrome. Understanding MTS helps guide cancer screening and care for affected individuals and their families.

MTX, also known as methotrexate sodium, Trexall, or Xatmep, is a chemotherapy drug used to treat various cancers and some other medical conditions. It works by blocking cells from using folic acid to make DNA, which can help stop cancer cells from growing. Patients may see different names for this drug, so it’s important to ask your care team how it applies to your specific treatment.

MUC-1 is a protein found on the surface of certain normal cells and many cancer cells. It may appear in higher amounts in some cancers like breast, ovarian, lung, and prostate. Doctors sometimes measure MUC-1 to help monitor cancer treatment or detect if cancer has returned. It is not a diagnosis or treatment by itself but can be part of tests or experimental therapies.

Mucin/Peptide is a compound made of protein and sugar that some cancer cells produce. It can be part of how cancer cells grow or spread. Understanding this term can help patients recognize its mention in medical reports or discussions about cancer biology and treatment. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Mucinous describes cancer cells that contain or resemble mucin, a main part of mucus. It is a term used to describe certain types of cancers, especially in the ovary or uterus. If you see this word in your medical reports or discussions, it’s important to ask your care team what it means for your specific diagnosis and treatment, rather than assuming it alone defines your cancer or care plan.

Mucinous carcinoma is a type of cancer that starts in cells lining certain organs and produces mucin, a main part of mucus. It often occurs in organs like the ovary or uterus. This term describes how the cancer cells look under a microscope but does not alone determine treatment or prognosis. Patients should discuss what mucinous carcinoma means for their individual case with their care team.

Mucosa, also called mucous membrane, is the moist inner lining found in many organs and body cavities such as the nose, mouth, lungs, and stomach. It produces mucus, a slippery fluid that helps protect and keep tissues moist. In cancer care, mucosa is important because some cancers and infections can start in these tissues. Understanding mucosa in your medical reports can help you ask the right questions about your diagnosis and treatment.

Mucosa-Associated Lymphoid Tissue (MALT) lymphoma is a type of cancer that starts in immune cells found in mucosal tissues, such as the stomach or eyes. These tissues help the body fight infections by making antibodies. MALT lymphoma often grows slowly and may be linked to long-term infections or inflammation in the affected area.

Mucosal HPV refers to human papillomaviruses that infect the moist inner linings of organs like the cervix, mouth, throat, anus, and genitals. These viruses include low-risk types that can cause warts and high-risk types that may lead to cancer over time. Understanding mucosal HPV in your medical reports is important, but it’s best to discuss what it means for you personally with your healthcare team.

Mucosal Human Papillomavirus (HPV) is a group of viruses that infect the moist inner linings of body parts like the genitals, anus, mouth, and throat. Some types cause warts and rarely lead to cancer, while others (called high-risk types) can cause cell changes that may develop into cancer over time if untreated. Understanding mucosal HPV helps in prevention, screening, and care.

Mucosal neuromas are non-cancerous growths made of nerve cells that appear on the lips, tongue, mouth lining, eyelids, and digestive tract. They are a key sign of a rare inherited condition called multiple endocrine neoplasia type 2B (MEN2B). These growths usually cause no symptoms and do not need treatment. Family members of someone with MEN2B may be tested even if they show no signs, because early thyroid surgery can improve outcomes.

Mucositis is inflammation and sores in the lining of the mouth or digestive tract caused by cancer treatments like chemotherapy and radiation. It can cause pain, difficulty eating, and increase infection risk. Good oral care and symptom management are important to help patients continue treatment and maintain quality of life.

A mucous membrane, also called mucosa, is the moist lining inside many body parts like the mouth, nose, stomach, and reproductive organs. It helps protect the body by trapping germs and keeping tissues moist. In cancer care, mucous membranes may be mentioned when discussing areas affected by cancer or treatment, such as the lining of the mouth or anus.

Mucus is a thick, slippery fluid made by the lining of certain organs like the nose, lungs, and digestive tract. In cancer care, mucus may be mentioned when managing lung symptoms such as coughing or thick mucus caused by infections or treatment side effects. It’s important to understand mucus in context and ask your healthcare team how it relates to your specific situation.

Mucus Colitis, also known as irritable bowel syndrome (IBS), irritable colon, or spastic colon, is a common digestive condition causing abdominal pain, bloating, and changes in bowel habits like diarrhea or constipation. It does not damage the intestines but can cause ongoing discomfort. Understanding this term helps patients and caregivers discuss symptoms and care with their healthcare team.

The Mucusless Diet Healing System is an alternative diet approach developed in the early 1900s that focuses on eating foods believed to produce little or no mucus in the body. It is sometimes discussed in cancer care for its potential effects on nutrition, digestion, inflammation, and immune support. However, it is not a standard or scientifically proven cancer treatment and should be reviewed carefully with healthcare providers before use.

Muir-Torre syndrome (MTS) is a rare inherited condition that causes tumors to form in the oil glands of the skin and in certain internal organs, such as the colon and urinary tract. These tumors can be benign or cancerous. MTS is linked to changes in specific genes and is considered a type of Lynch syndrome, which raises the risk of certain cancers.

Muj591 is a laboratory-made monoclonal antibody used in cancer care to help detect or treat cancer. Monoclonal antibodies like Muj591 are designed to find and attach to cancer cells, which can help doctors identify cancer or deliver treatments more precisely. Its exact role depends on the type of cancer and the treatment plan.

A Mullerian tumor is a rare type of cancer that usually starts in the uterus, ovary, or fallopian tubes. It is called a Malignant Mixed Müllerian Tumor (MMMT) when it contains two kinds of cancer cells: carcinoma (from organ linings) and sarcoma (from connective tissues). This mix can make diagnosis and treatment more complex than for other cancers.

A Multi-Cancer Detection (MCD) test is a blood test being studied to screen for many types of cancer at once. It looks for pieces of DNA and other markers that cancer cells release into the blood. These tests may help find cancers early, even in parts of the body that are hard to check with exams or biopsies. MCD tests are sometimes called multi-cancer early detection (MCED) tests or liquid biopsies.

The Tesla Coil or Multi-Wave Oscillator is a device sometimes mentioned in cancer care for various reasons, including claims of direct anticancer effects, symptom relief, nutrition support, or improving quality of life. It is considered a complementary approach and is not an established cancer treatment. Anyone thinking about using it during cancer care should talk with their healthcare team to ensure safety and coordination with other treatments.

A multicenter study is a clinical trial conducted at more than one medical center or hospital. This approach helps researchers gather information from a larger and more diverse group of patients. Multicenter studies are important in cancer care because they can provide stronger evidence about how well a treatment works across different settings.

Multicentric breast cancer is a rare type of breast cancer where more than one tumor forms independently in different parts of the breast. It is important for patients and caregivers to understand this term in the context of their own diagnosis and treatment, and to discuss its meaning with their healthcare team rather than relying on the term alone.

Multidisciplinary describes a cancer care approach where a team of doctors and health professionals from different specialties work together. This team may include medical oncologists, surgeons, radiation oncologists, and others. Their combined expertise helps create a treatment plan tailored to the patient’s needs, aiming for the best possible outcomes. This entry helps connect the word with diagnoses, testing, treatments, supportive care, research notes, protocols, media, books, people, organizations, and safety concerns.

Multidrug resistance happens when cancer cells adapt to resist the effects of several chemotherapy drugs, making treatment less effective. Some experimental treatments, like CBT-1, aim to block proteins that help cancer cells pump out drugs, potentially improving chemotherapy’s impact. It’s important to discuss with your care team how multidrug resistance relates to your specific situation.

Multidrug resistance inhibition refers to treatments that help make cancer cells less resistant to chemotherapy drugs. Some cancer cells develop ways to protect themselves from multiple drugs, making treatment less effective. Multidrug resistance inhibitors, like CBT-1, work by blocking these protective mechanisms, potentially improving how well chemotherapy works. Patients should discuss with their care team how this concept applies to their specific situation.

Multifocal breast cancer means having more than one tumor in the same breast, all starting from one original tumor. These tumors are usually found close together in the same area of the breast. If you hear this term, it’s important to talk with your care team about what it means for your specific situation, rather than assuming it tells you everything about your diagnosis or treatment.

A multigene panel test (MGPT) is a lab test that looks at many genes at once to find changes that might increase the risk of diseases like cancer. It helps doctors understand genetic mutations that could affect cancer risk, treatment choices, or chances of cancer returning. This test may be called MGPT or multigene test, so checking the exact name in your report can help avoid confusion.

A multigene test (also called MGPT or multigene panel test) is a lab test that looks at many genes at once to find changes that might increase the risk of diseases like cancer. It helps doctors understand genetic mutations that could affect cancer risk, guide treatment choices, or predict if cancer might spread or return. Checking the exact test name in reports can help avoid confusion.

Multihance, also called Gadobenate Dimeglumine, is a contrast agent used during MRI scans. It helps make blood vessels and tissues in the brain, spine, liver, and other organs clearer on images. This can help doctors find abnormal areas, including possible cancer. If you see this term in your medical information, ask your care team what it means for your specific situation.

Multimodality therapy, also called combination therapy or multimodality treatment, means using two or more types of cancer treatments together. This approach aims to attack cancer in different ways to improve results. It may involve surgery, chemotherapy, radiation, targeted drugs, or other treatments. Because combining treatments can increase side effects or lengthen treatment time, doctors carefully weigh the benefits and risks for each patient.

Multimodality treatment, also called combination therapy, means using two or more types of cancer treatments together, such as surgery, chemotherapy, radiation, or targeted drugs. This approach aims to attack cancer in different ways to improve treatment results. Because combining treatments can sometimes cause more side effects or lengthen treatment time, doctors carefully balance the benefits and risks for each patient.

Multiple Endocrine Adenomatosis, also called MEN1 Syndrome or Wermer Syndrome, is a rare inherited condition that causes tumors in several hormone-producing glands, such as the parathyroid, pituitary, and pancreas. These tumors are usually noncancerous but can affect hormone levels and lead to other health problems. Understanding the different names for this condition can help avoid confusion in medical reports.

Multiple Endocrine Adenomatosis Type 2 (MEN2) is a rare inherited condition affecting hormone-producing glands like the thyroid, parathyroid, and adrenal glands. It can cause tumors that may produce too much hormone, leading to health issues such as high blood pressure and kidney stones. MEN2 increases the risk of certain cancers, including medullary thyroid cancer and adrenal gland tumors.

Multiple Endocrine Adenomatosis Type 2A (MEN2A) is a rare inherited condition affecting hormone-producing glands. It raises the risk of medullary thyroid cancer, tumors in the adrenal glands called pheochromocytomas, and parathyroid gland problems. These glands may produce too many hormones, causing symptoms like high blood pressure or kidney stones. MEN2A is caused by a change in the RET gene and is also known as Sipple syndrome.

Multiple Endocrine Adenomatosis Type 2B (MEN2B) is a rare inherited condition that affects hormone-producing glands. It increases the risk of certain cancers, especially medullary thyroid cancer, and can cause tumors in the adrenal and parathyroid glands. People with MEN2B may also develop noncancerous growths around nerves in the mouth, lips, tongue, and eyelids, along with digestive and bone-related symptoms.

Multiple Endocrine Neoplasia Syndrome (MEN syndrome) is an inherited condition that can cause tumors or cancers in hormone-producing glands. There are different types of MEN, each linked to specific gene changes. People with MEN may develop various benign or malignant tumors in glands like the thyroid, parathyroid, or adrenal glands. Genetic testing helps identify MEN and guide monitoring and treatment.

Multiple Endocrine Neoplasia Type 1 Syndrome (MEN1), also called MEN1 Syndrome, Multiple Endocrine Adenomatosis, or Wermer Syndrome, is a rare inherited condition that causes mostly noncancerous tumors in hormone-producing glands like the parathyroid, pituitary, and pancreas. These tumors can lead to high hormone levels and related health problems such as kidney stones, fertility issues, and ulcers. Some pancreatic tumors may become cancerous, so regular monitoring is important.

Multiple Endocrine Neoplasia Type 2 Syndrome (MEN2) is a rare inherited condition that affects hormone-producing glands like the thyroid, parathyroid, and adrenal glands. It can cause tumors that may produce too much hormone, leading to health problems such as high blood pressure and kidney stones. MEN2 also increases the risk of certain cancers, including medullary thyroid cancer and adrenal gland tumors.

Multiple Endocrine Neoplasia Type 2A Syndrome (MEN2A) is a rare inherited condition that affects hormone-producing glands. It increases the risk of medullary thyroid cancer, tumors in the adrenal glands called pheochromocytomas, and parathyroid gland problems. These glands may produce too many hormones, causing symptoms like high blood pressure or kidney stones. MEN2A is caused by a change in the RET gene and is also known as Sipple syndrome.

Multiple Endocrine Neoplasia Type 2B Syndrome (MEN2B) is a rare inherited condition that affects hormone-producing glands. It increases the risk of certain cancers, especially medullary thyroid cancer, and can cause tumors in the adrenal and parathyroid glands. People with MEN2B may also develop noncancerous growths around nerves in the mouth, lips, tongue, and eyelids, along with digestive and bone-related symptoms.

Multiple Hamartoma Syndrome, also called Cowden Disease or Cowden Syndrome, is a rare inherited condition that causes many benign (non-cancerous) growths called hamartomas to form in the body. People with this syndrome have a higher risk of developing certain cancers, including breast, thyroid, and uterine cancers. Understanding this condition helps with early detection and management of related health issues.

Multiple myeloma is a cancer that starts in plasma cells, a type of white blood cell in the bone marrow that helps fight infections. It is also known by other names like Kahler disease and plasma cell myeloma. This cancer causes abnormal plasma cells to build up, which can damage bones and affect the immune system. Treatments vary depending on symptoms and disease stage.

Multiple sclerosis (MS) is a disease where the immune system mistakenly attacks the protective covering of nerve cells in the brain and spinal cord. This can cause symptoms like muscle weakness, numbness, vision problems, and trouble with coordination. MS often starts between ages 20 and 40 and affects women more than men. While there is no cure, treatments can help manage symptoms and slow the disease.

Multiple Self-Healing Squamous Epithelioma (MSSE), also called Ferguson-Smith Syndrome, is a rare inherited condition caused by changes in the TGFBR1 gene. It leads to many fast-growing skin tumors that look like squamous cell skin cancer, often appearing on the nose, face, ears, arms, and legs. These tumors usually heal on their own but can leave deep scars.

Multiplicity means a large number or variety of something. In cancer care, it’s important to understand this term in context, especially when you see it in medical reports or discussions. It does not by itself mean a diagnosis or treatment plan. Always ask your care team how it applies to your specific situation.

ABT-869 is an experimental cancer drug that blocks several growth factors cancer cells need to grow. It also may stop tumors from making new blood vessels, which tumors require to get nutrients. ABT-869 belongs to a group of targeted therapies called receptor tyrosine kinase inhibitors and angiogenesis inhibitors. It is still being studied and is not yet a standard treatment.

Mung bean is a type of bean grown in warm climates, often used for its seeds and sprouts. Some early research suggests it may have anticancer effects, but it is important for patients and caregivers to discuss its role with their healthcare team. This entry is for education and does not recommend mung bean as a treatment or diagnosis.

Muramyl Tripeptide Phosphatidylethanolamine, also called L-MTP-PE, MEPACT, or mifamurtide, is a drug that helps the immune system fight certain bone cancers, especially osteosarcoma in children and young adults. It works by activating white blood cells to attack cancer cells and is usually given after surgery and chemotherapy. Patients should ask their care team how it applies to their treatment.

Muromonab-CD3 is a medication once used to prevent or treat acute rejection in organ transplant patients. It is a laboratory-made antibody that targets T cells, a type of immune cell. Because it can cause strong immune reactions, it is given with other medicines to reduce side effects. Although no longer available in the U.S., understanding this drug helps patients and caregivers discuss transplant care and immune therapies with their healthcare team.

Muscle relaxants are medicines used to ease muscle stiffness, spasms, and pain. They can help reduce muscle tension caused by various conditions and are sometimes used during surgery to prevent muscle movement. Muscle relaxants work in different ways, either by acting on the brain and spinal cord or directly on muscles. Patients should always discuss with their care team how muscle relaxants fit into their treatment plan.

Muscle wasting means losing muscle strength and size, often caused by illness or not using muscles enough. In cancer care, it can happen alongside unintended weight loss and poor appetite. Managing muscle wasting involves nutrition support, symptom control, and working with dietitians to help patients stay stronger and better tolerate treatments. It’s important to understand muscle wasting in context and ask your care team how it relates to your situation.

Musculoskeletal refers to the parts of the body that include muscles, bones, joints, tendons, ligaments, and cartilage. In cancer care, musculoskeletal issues may arise from the cancer itself or from treatments, causing symptoms like joint pain or stiffness. Sometimes, complementary therapies like chiropractic care are used to help manage these symptoms. Always discuss musculoskeletal concerns with your care team to understand what they mean for you.

MUSE (Medicated Urethral System for Erection) is a treatment for men who have difficulty getting or keeping an erection, known as erectile dysfunction. It uses a small pellet containing medicine inserted into the urethra to increase blood flow and help produce an erection. MUSE offers a needle-free option, often used by men experiencing erectile problems related to cancer treatments.

Mushroom-Based Immune Diets are nutrition plans that include mushrooms to support immune health, digestion, and inflammation in people with cancer. They are discussed for helping with nutrition, treatment tolerance, and overall well-being. These diets may be used alongside conventional cancer care but should be reviewed with healthcare providers to ensure safety and avoid interactions.

Music therapy is a supportive approach that uses music activities like listening, singing, or playing instruments to help improve mood, reduce stress, and ease symptoms such as pain or anxiety during cancer care. It is a complementary therapy that can enhance quality of life but does not replace medical cancer treatments.

Mustine, also known as mechlorethamine hydrochloride or Valchlor, is a chemotherapy drug used mainly to treat a type of skin lymphoma called mycosis fungoides. It works by damaging cancer cells’ DNA to help stop their growth. Mustine may appear under different names, so it’s important to ask your care team how it applies to your specific treatment.

A mutagen is anything that causes a change (mutation) in the DNA of a cell. These changes can sometimes harm cells and may lead to diseases like cancer. Common mutagens include certain chemicals, radiation like X-rays or ultraviolet light, and radioactive substances. Understanding mutagens helps explain how some cancers start and why avoiding certain exposures can be important.

To mutate means to change the genetic material in a cell. In cancer care, mutations are changes in genes that can affect how cancer grows or responds to treatment. When you hear the word “mutate,” it’s important to understand it in context—such as whether a gene is normal or mutated—and to ask your care team what it means for your diagnosis or treatment options.

A mutation is a change in the DNA of a cell. Some mutations can increase the risk of cancer or affect how cancer is treated. Genetic testing can find mutations like BRCA changes, which may influence treatment choices. It’s important to understand mutations in context and discuss with your care team what they mean for you personally.

A mutation carrier is a person who has a changed (mutated) gene that may increase their risk of certain diseases, including some cancers. They face the usual risks from lifestyle and aging, plus extra risks linked to the mutation. For example, some BRCA gene mutations raise the chance of breast, ovarian, or prostate cancer and may affect how early or aggressive these cancers develop.

MUTYH-Associated Polyposis (MAP) is a rare inherited condition where many small growths called polyps develop in the colon and rectum. People with MAP usually have fewer than 100 polyps, which can also appear in the stomach and small intestine. This condition increases the risk of colorectal cancer and some other cancers. It is caused by changes in the MUTYH gene inherited from both parents.

MVAC is a chemotherapy treatment combining four drugs—methotrexate, vinblastine sulfate, doxorubicin hydrochloride, and cisplatin—used mainly for advanced bladder and urethral cancers. Patients may see the term MVAC or MVAC regimen in medical reports or treatment plans. It’s important to discuss with your care team how this treatment applies to your specific situation rather than assuming it defines your diagnosis or treatment alone.

MVAC is a chemotherapy treatment combining four drugs—methotrexate, vinblastine sulfate, doxorubicin hydrochloride, and cisplatin—mainly used for advanced bladder and urethral cancers. Patients may see the term MVAC or MVAC regimen in medical reports or treatment plans. It’s important to discuss with your care team how this treatment applies to your specific situation rather than assuming it defines your diagnosis or treatment alone.

Mvasi is a cancer medicine containing the active drug bevacizumab. It works by blocking a protein called VEGF that tumors use to grow new blood vessels. Mvasi is used alone or with other drugs to treat several cancers, including cervical, colorectal, lung, kidney, brain, and ovarian cancers. It helps slow tumor growth by cutting off the blood supply tumors need.

Myalgia means muscle pain or aching in one or more muscles. It can happen for many reasons, such as muscle overuse, injury, infections, or as a side effect of cancer treatments. Understanding myalgia helps patients describe their symptoms and work with their care team to manage discomfort during cancer care.

Myasthenia gravis is a long-lasting autoimmune disease that causes weakness in voluntary muscles, such as those controlling the eyes, face, swallowing, and movement. Muscle weakness often worsens with activity and improves with rest. It can affect people of any age but is most common in young adult women and older men. While there is no cure, treatments can help improve symptoms and muscle strength.

The MYC gene family includes genes that produce proteins important for cell growth, development, and death. Changes in these genes can be linked to some cancers, such as leukemia and lymphoma. If you see this term, it’s important to ask your care team what it means for your specific situation rather than assuming it is a diagnosis or treatment plan.

A MYCN Amplification Study is a lab test that checks how many copies of the MYCN gene are in tumor cells. Tumors with extra copies of this gene, like some neuroblastomas, may grow faster and spread more easily. This test helps doctors understand the tumor better, but patients should always discuss what the results mean for their specific case with their care team.

Mycobutin, also known as rifabutin, is an antibiotic medicine used to treat tuberculosis (TB) and to prevent infections caused by certain bacteria in people with weakened immune systems, such as those with advanced HIV/AIDS. It works by stopping bacteria from growing. Mycobutin was approved for use in the United States in 1992 and is sometimes used when other similar drugs cannot be taken.

Mycophenolate mofetil, also known by the brand name Cellcept, is a medicine that helps prevent the immune system from attacking transplanted organs or cells. It is commonly used after organ transplants and is being studied for use after stem cell transplants in cancer care. Because it lowers immune activity, patients taking this drug need careful monitoring for infections and side effects.

Mycosis fungoides is a rare type of non-Hodgkin lymphoma that starts in certain white blood cells called T-lymphocytes and mainly affects the skin. It often begins as a red, patchy rash and can progress to raised bumps or thickened skin lesions. In a related condition called Sézary syndrome, cancerous T-cells are also found in the blood. Diagnosis involves skin and blood tests, and treatment options vary based on disease stage and other factors.

A mycosis fungoides patch is a flat, thin, pink or red rash that appears on the skin in people with mycosis fungoides, a type of skin lymphoma. These patches may look like eczema or psoriasis and often appear on areas like the lower abdomen, upper thighs, buttocks, or breasts. Understanding this term is important in the context of diagnosis and treatment, so patients should discuss its meaning with their care team.

A mycosis fungoides plaque is a small, raised, thickened area on the skin seen in people with mycosis fungoides, a type of skin lymphoma. These plaques can be red, scaly, and itchy, often resembling eczema or psoriasis. They commonly appear on the lower abdomen, upper thighs, buttocks, and breasts. Understanding this term helps patients discuss their skin changes with their care team in context.

Mycostatin is a brand name for nystatin, an antifungal medicine often used to prevent or treat fungal infections like thrush in people with weakened immune systems, such as those receiving chemotherapy or living with AIDS. It can be taken by mouth or applied to the skin. Side effects may include stomach upset or allergic reactions. Always ask your care team how Mycostatin applies to your specific situation.

Myelin is a fatty substance that covers and protects nerve fibers in the brain, spinal cord, and nerves throughout the body. It acts like insulation around electrical wires, helping nerve signals travel quickly and smoothly. Myelin is important for movement, sensation, and thinking. Damage to myelin can affect how nerves work and may be involved in some diseases.

Myeloablation, also called severe myelosuppression, is a serious decrease in bone marrow activity caused by some cancer treatments. This leads to fewer red blood cells, white blood cells, and platelets. It is important to understand this term in the context of your care and to ask your healthcare team how it applies to your specific situation.

Myeloablative chemotherapy is a type of high-dose chemotherapy that destroys cells in the bone marrow, including cancer cells. Because it also lowers the number of normal blood-forming cells, it is usually followed by a bone marrow or stem cell transplant to help rebuild the bone marrow. This treatment is often used before a transplant in certain cancers.

A myeloblast is an immature white blood cell made in the bone marrow. It normally develops into mature cells that help fight infection. When too many myeloblasts build up, it can be a sign of certain blood cancers like acute myeloid leukemia (AML). Understanding this term helps patients and caregivers ask questions about diagnosis and treatment.

Myeloblastic refers to myeloblasts, which are immature cells made in the bone marrow that develop into certain white blood cells. In cancer care, the term often relates to acute myeloid leukemia (AML), where too many myeloblasts build up and crowd out healthy blood cells. Patients may see this word in medical reports or treatment discussions and should ask their care team what it means for their specific situation.

Myelodysplasia refers to abnormal changes in bone marrow cells that can affect blood cell production. It is linked to blood disorders and certain types of leukemia. Knowing about myelodysplasia-related changes helps doctors choose the best tests and treatments. Patients should ask their care team how this term applies to their specific diagnosis and care plan.

Myelodysplastic syndrome (MDS) is a group of cancers where the bone marrow does not produce enough healthy blood cells. This can lead to problems like anemia, infections, or easy bleeding. MDS often has no early symptoms and may be found during routine blood tests. Treatment options include supportive care, drug therapy, and stem cell transplant. Risk factors include older age, past cancer treatments, and exposure to certain chemicals.

Myelofibrosis is a rare bone marrow disorder where scar tissue replaces healthy marrow, causing blood cells to be made in other organs like the liver and spleen. This can lead to symptoms such as an enlarged spleen and anemia. It is related to certain blood cancers and requires careful monitoring and treatment to manage symptoms and risks.

Myelogenous refers to cells or conditions related to the bone marrow, where blood cells are made. It is often used in terms like acute myelogenous leukemia (AML), a type of blood cancer that starts in the bone marrow and affects blood and organs. For patients and caregivers, it’s important to understand the term in context and ask the care team how it applies to their specific situation.

A myelogram is an imaging test that uses dye injected near the spinal cord to help doctors see problems like injuries, cysts, or tumors. It is often replaced by MRI scans but may be used for patients who cannot have an MRI. The test involves X-rays or CT scans after dye injection and requires careful aftercare to avoid infection or complications.

Myeloid refers to cells related to the bone marrow, where blood cells are made. It often describes certain blood cancers like acute myeloid leukemia (AML) and chronic myeloid leukemia (CML), which involve abnormal growth of myeloid cells. These cancers can cause symptoms like tiredness, weight loss, fever, and easy bleeding. Diagnosis usually involves blood tests, bone marrow tests, and genetic testing. Treatments vary by type and may include chemotherapy, targeted therapy, or stem cell transplant.

Myeloid sarcoma, also called chloroma, granulocytic sarcoma, or extramedullary myeloid tumor, is a rare cancer made of immature white blood cells called myeloblasts. Unlike many blood cancers, it forms solid tumors outside the bone marrow and blood. It is often linked to acute myeloid leukemia or related blood disorders and can appear anywhere in the body.

Myeloma, also called multiple myeloma, is a cancer that starts in plasma cells, a type of white blood cell found in bone marrow. It causes abnormal plasma cells to grow and form tumors in bones or soft tissues. Symptoms may include bone pain, fractures, fatigue, and infections. Diagnosis involves blood tests, imaging, and bone marrow biopsy. Treatments vary and may include chemotherapy, targeted therapy, and newer options like CAR T-cell therapy for cases that return or don’t respond to other.

Myelomatosis, also known as Kahler Disease, Multiple Myeloma, or Plasma Cell Myeloma, is a type of cancer that starts in plasma cells, a kind of white blood cell that helps fight infections. In this disease, abnormal plasma cells grow uncontrollably, often forming tumors in bones or soft tissues. It can cause symptoms like bone pain, fatigue, and infections, and requires medical care and monitoring.

A myelomonocyte is a type of white blood cell that appears in a blood disorder called chronic myelomonocytic leukemia (CMML). In CMML, the bone marrow makes too many of these cells, which can crowd out normal blood cells and cause symptoms like tiredness, easy bruising, and infections. Understanding this term can help patients and caregivers ask informed questions about diagnosis and care.

Myeloproliferative neoplasms (MPNs) are blood diseases where the bone marrow makes too many blood cells, such as red blood cells, platelets, or certain white blood cells. These conditions usually develop slowly and can cause symptoms like fatigue, bleeding, anemia, or infections. Some types may change into a more serious leukemia over time.

Myelosclerosis with myeloid metaplasia is a long-term condition where scar tissue slowly replaces the bone marrow, the body’s blood cell factory. This causes blood cells to be made in other organs like the liver and spleen, often leading to an enlarged spleen and anemia. It is also known by other names such as primary myelofibrosis and chronic idiopathic myelofibrosis.

Myelosuppression is a side effect of some cancer treatments that causes the bone marrow to produce fewer blood cells. This can lead to low red blood cells, white blood cells, and platelets, affecting oxygen delivery, infection defense, and blood clotting. It’s important to understand this term in the context of your care and ask your healthcare team how it applies to you personally.

Myelosuppressive therapy is a type of treatment, including chemotherapy and radiation, that slows or stops the growth of blood-forming cells in the bone marrow. This can lower the number of red blood cells, white blood cells, and platelets. It is used in cancer care and some blood disorders. Patients should ask their care team how it applies to their specific situation.

Myleran is a chemotherapy drug containing busulfan, used mainly to treat chronic myelogenous leukemia (CML). It works by damaging the DNA of cancer cells to help stop their growth. Myleran is also used with other medicines to prepare patients for stem cell transplants. If your care team mentions Myleran, ask how it fits into your treatment plan and what to expect.

Mylotarg (gemtuzumab ozogamicin) is a targeted cancer drug used to treat acute myeloid leukemia (AML) that has a protein called CD33 on the cancer cells. It combines an antibody that finds cancer cells with a chemotherapy drug to help kill them. It is approved for adults and children with newly diagnosed or relapsed AML.

Myocarditis is an inflammation of the heart muscle, often caused by viral infections but sometimes by bacteria, parasites, fungi, autoimmune conditions, radiation, or certain drugs. Symptoms can range from none or mild to severe, including chest pain, irregular heartbeat, trouble breathing, fatigue, and swelling. It is important to understand myocarditis in the context of your own health and discuss with your care team what it means for you.

A myoclonic jerk is a sudden, brief, and strong muscle twitch or spasm that cannot be controlled. These jerks can happen to anyone and are common near the end of life in people with serious illnesses like cancer. If you see this term in medical notes, it’s important to ask your care team what it means for the specific person, rather than assuming it is a diagnosis or treatment on its own.

Myoinositol, also called inositol, is a nutrient related to the vitamin B complex that the body needs in small amounts. It helps cells build membranes and communicate. Found in foods like beans, nuts, and brown rice, myoinositol is being studied for cancer prevention but is not a cancer treatment. Always ask your care team how it applies to your health.

The myometrium is the middle, muscular layer of the uterus. It plays an important role in pregnancy and childbirth by stretching and contracting. In cancer care, how far cancer has spread into the myometrium helps doctors determine the stage of uterine cancers, which guides treatment decisions. Patients should ask their care team what the term means in their specific situation.

Myopericytoma is a rare, slow-growing tumor that starts in cells surrounding blood vessels. Most myopericytomas are benign, meaning they are not cancer. These tumors can appear anywhere in the body but are most often found in the legs, trunk, or head and neck. They can occur in children but are more common in middle-aged adults. If you see this term in your medical information, it’s important to discuss what it means for your specific situation with your care team.

Myristyl nicotinate cream is a skin treatment containing a form of niacin (vitamin B3). It is being studied to help reduce side effects of retinoic acid, a vitamin A form used on sun-damaged skin. Researchers are also exploring its potential role in preventing skin cancer. Patients should discuss with their care team how this cream might relate to their own treatment or skin care.

Myxofibrosarcoma is a rare type of cancer that forms in the soft tissues, usually in or just under the skin of the arms or legs. It most often affects older adults and can sometimes come back after treatment. Because it can behave differently in each person, it’s important to talk with your care team about what this diagnosis means for you or your loved one.

Myxoid liposarcoma is a rare type of cancer that starts in fat cells, usually found in the thigh but sometimes in other parts of the body like the buttock or abdomen. It mainly affects adults and is uncommon in children. This cancer is a form of soft tissue sarcoma and may have a specific genetic change called a translocation. Understanding this diagnosis helps guide treatment and care.

Marginal zone lymphoma (MZL) is a slow-growing cancer that starts in B cells, a type of white blood cell important for the immune system. It begins in specific areas of lymph tissue called marginal zones, which can be found in the spleen, lymph nodes, or other lymphoid tissues. MZL is a type of non-Hodgkin lymphoma and may also be called marginal zone B-cell lymphoma.

μM (micromolar) is a unit that measures the concentration of a substance in a liquid, meaning one millionth of a mole per liter. In cancer care, it helps describe how much of a drug or chemical is present in blood or lab tests. Understanding μM can help patients and caregivers discuss test results or treatment details with their healthcare team.