In English | En español
Questions About Cancer? 1-800-4-CANCER

NCI Dictionary of Cancer Terms

Page Options

  • Print This Page

Widget

NCI Dictionary of Cancer Terms


220 results found for:       F



F 18 sodium fluoride positron emission tomography    listen   (… SOH-dee-um FLOOR-ide PAH-zih-tron ee-MIH-shun toh-MAH-gruh-fee)
A procedure used to find out if cancer has spread to the bone. A small amount of a radioactive substance called fluorine F 18 sodium fluoride is injected into a vein. A PET scan is then used to make detailed pictures of the bones. Bones with cancer in them take up more fluorine F18 sodium fluoride than normal bones do. Also called F-18 NaF PET and fluorine F 18 sodium fluoride PET.

F-18 16 alpha-fluoroestradiol    listen   (… AL-fuh-FLOOR-oh-es-truh-DY-ol)
A radiolabeled substance being studied as an imaging agent in breast cancer. F-18 16 alpha-fluoroestradiol binds to estrogen receptors and gives off radiation that can be detected by a PET scan. The PET scan forms an image that shows where cancer cells with estrogen receptors can be found in the body. It is a type of radioimaging agent. Also called F-18 FES.

F-18 FES      
A radiolabeled substance being studied as an imaging agent in breast cancer. F-18 FES binds to estrogen receptors and gives off radiation that can be detected by a PET scan. The PET scan forms an image that shows where cancer cells with estrogen receptors can be found in the body. It is a type of radioimaging agent. Also called F-18 16 alpha-fluoroestradiol.

F-18 NaF PET      
A procedure used to find out if cancer has spread to the bone. A small amount of a radioactive substance called fluorine F 18 sodium fluoride is injected into a vein. A PET scan is then used to make detailed pictures of the bones. Bones with cancer in them take up more fluorine F18 sodium fluoride than normal bones do. Also called F 18 sodium fluoride positron emission tomography and fluorine F 18 sodium fluoride PET.

F511 cream    listen   (… creem)
A substance being studied in the prevention of palmar-plantar erythrodysesthesia (pain, swelling, numbness, tingling, or redness of the palms of the hands or soles of the feet) in breast cancer patients treated with anticancer drugs. F511 cream contains a substance that is used in products to control excess sweating under the arms and on the palms of the hands and soles of the feet. It is a type of antiperspirant.

falimarev    listen   (fuh-LIM-uh-rev)
A cancer vaccine made with a form of a chicken virus that does not cause disease in humans. It is being studied in the treatment of some types of cancer. The virus is changed in the laboratory to make human proteins that may help immune cells in the body kill tumor cells. Also called recombinant fowlpox-CEA-MUC-1-TRICOM vaccine.

fallopian tube    listen   (fuh-LOH-pee-in...)
A slender tube through which eggs pass from an ovary to the uterus. In the female reproductive tract, there is one ovary and one fallopian tube on each side of the uterus.

fallopian tube cancer    listen   (fuh-LOH-pee-in … KAN-ser)
Cancer that forms in tissues of the fallopian tube (one of two slender tubes that connect the ovaries to the uterus). Most fallopian tube cancers begin in cells that line the fallopian tubes. They are similar to ovarian epithelial cancers and are staged and treated the same way.

false-negative test result    listen   (... NEH-guh-tiv ... reh-ZULT)
A test result that indicates that a person does not have a specific disease or condition when the person actually does have the disease or condition.

false-positive test result    listen   (... PAH-zih-tiv ... reh-ZULT)
A test result that indicates that a person has a specific disease or condition when the person actually does not have the disease or condition.

familial adenomatous polyposis    listen   (fuh-MIH-lee-ul A-deh-NOH-muh-tus PAH-lee-POH-sis)
An inherited condition in which numerous polyps (growths that protrude from mucous membranes) form on the inside walls of the colon and rectum. It increases the risk of colorectal cancer. Also called familial polyposis and FAP.

familial atypical multiple mole melanoma syndrome    listen   (fuh-MIH-lee-ul AY-TIH-pih-kul MUL-tih-pul ... MEH-luh-NOH-muh SIN-drome)
An inherited condition marked by the following: (1) one or more first- or second-degree relatives (parent, sibling, child, grandparent, grandchild, aunt, or uncle) with malignant melanoma; (2) many moles, some of which are atypical (asymmetrical, raised, and/or different shades of tan, brown, black, or red) and often of different sizes; and (3) moles that have specific features when examined under a microscope. Familial atypical multiple mole melanoma syndrome increases the risk of melanoma and may increase the risk of pancreatic cancer. Also called FAMMM syndrome.

familial cancer    listen   (fuh-MIH-lee-ul KAN-ser)
Cancer that occurs in families more often than would be expected by chance. These cancers often occur at an early age, and may indicate the presence of a gene mutation that increases the risk of cancer. They may also be a sign of shared environmental or lifestyle factors.

familial dysplastic nevi    listen   (fuh-MIH-lee-ul dis-PLAS-tik NEE-vye)
A condition that runs in certain families in which at least two members have dysplastic nevi (atypical moles) and have a tendency to develop melanoma.

familial isolated hyperparathyroidism    listen   (fuh-MIH-lee-ul I-soh-LAY-ted HY-per-PAYR-uh-THY-roy-dih-zum)
A rare inherited condition in which one or more tumors form in the parathyroid glands (four pea-sized organs found on the thyroid) and cause them to make too much parathyroid hormone. The increased parathyroid hormone causes a loss of calcium from the bones and too much calcium in the blood. Also called FIHP.

familial medullary thyroid cancer    listen   (fuh-MIH-lee-ul MED-yoo-LAYR-ee THY-royd KAN-ser)
An inherited form of medullary thyroid cancer (cancer that forms in the cells of the thyroid that make the hormone calcitonin).

familial polyposis    listen   (fuh-MIH-lee-ul PAH-lee-POH-sis)
An inherited condition in which numerous polyps (growths that protrude from mucous membranes) form on the inside walls of the colon and rectum. It increases the risk of colorectal cancer. Also called familial adenomatous polyposis and FAP.

family history    listen   (FA-mih-lee HIH-stuh-ree)
A record of the relationships among family members along with their medical histories. This includes current and past illnesses. A family history may show a pattern of certain diseases in a family. Also called family medical history.

family medical history    listen   (FA-mih-lee MEH-dih-kul HIH-stuh-ree)
A record of the relationships among family members along with their medical histories. This includes current and past illnesses. A family medical history may show a pattern of certain diseases in a family. Also called family history.

family therapy    listen   (FA-mih-lee THAYR-uh-pee)
A type of therapy in which the whole family talks with a professional counselor to solve family problems.

FAMMM syndrome    listen   (… SIN-drome)
An inherited condition marked by the following: (1) one or more first- or second-degree relatives (parent, sibling, child, grandparent, grandchild, aunt, or uncle) with malignant melanoma; (2) many moles, some of which are atypical (asymmetrical, raised, and/or different shades of tan, brown, black, or red) and often of different sizes; and (3) moles that have specific features when examined under a microscope. FAMMM syndrome increases the risk of melanoma and may increase the risk of pancreatic cancer. Also called familial atypical multiple mole melanoma syndrome.

Fanconi anemia    listen   (fan-KOH-nee uh-NEE-mee-uh)
A rare inherited disorder in which the bone marrow does not make blood cells. It is usually diagnosed in children between 2 and 15 years old. Symptoms include frequent infections, easy bleeding, and extreme tiredness. People with Fanconi anemia may have a small skeleton and brown spots on the skin. They also have an increased risk of developing certain types of cancer.

Fanconi syndrome    listen   (fan-KOH-nee SIN-drome)
A group of kidney disorders that cause protein, sugar, minerals, and other nutrients to be lost in the urine. Symptoms include weakness, bone pain, and passing a greater than normal amount of urine. One form of Fanconi syndrome is inherited and is usually found in infants. Fanconi syndrome may also be caused by other diseases, a lack of vitamin D, or exposure to heavy metals or chemicals, including certain anticancer drugs.

FAP      
An inherited condition in which numerous polyps (growths that protrude from mucous membranes) form on the inside walls of the colon and rectum. It increases the risk of colorectal cancer. Also called familial adenomatous polyposis and familial polyposis.

Faridak    listen   (FAYR-ih-dak)
A drug being studied in the treatment of cancer. It blocks enzymes needed for cells to grow and divide and may kill cancer cells. Faridak may also prevent the growth of new blood vessels that tumors need to grow. It is a type of histone deacetylase inhibitor and a type of antiangiogenesis agent. Also called LBH589 and panobinostat.

Faslodex    listen   (FAZ-loh-dex)
A drug used to treat certain types of breast cancer in postmenopausal women. It is also being studied in the treatment of other types of cancer. Faslodex blocks estrogen activity in the body and is a type of antiestrogen. Also called fulvestrant and ICI 182780.

fast-neutron beam radiation    listen   (fast-NOO-tron beem RAY-dee-AY-shun)
A type of radiation therapy that uses tiny particles called neutrons made by a machine called a cyclotron.

fat necrosis    listen   (… neh-KROH-sis)
A benign condition in which fat tissue in the breast or other organs is damaged by injury, surgery, or radiation therapy. The fat tissue in the breast may be replaced by a cyst or by scar tissue, which may feel like a round, firm lump. The skin around the lump may look red, bruised or dimpled.

fat-soluble vitamin    listen   (… SOL-yoo-bul VY-tuh-min)
A vitamin that can dissolve in fats and oils. Fat-soluble vitamins are absorbed along with fats in the diet and can be stored in the body’s fatty tissue. They come from plant and animal foods or dietary supplements. Vitamins A, D, E, and K are fat-soluble.

fatigue    listen   (fuh-TEEG)
A condition marked by extreme tiredness and inability to function due lack of energy. Fatigue may be acute or chronic.

fatty acid    listen   (FA-tee A-sid)
A major component of fats that is used by the body for energy and tissue development.

fatty-replaced breast tissue    listen   (FA-tee-reh-PLAYST brest TIH-shoo)
A term used in mammography that refers to the replacement of breast tissue with fatty tissue. This commonly occurs as a woman ages.

FAU      
A substance being studied in the treatment of advanced solid tumors and lymphomas. It blocks the growth of cells and may cause cancer cells to die. It is a type of uracil analog. Also called 1-(2’-deoxy-2’-fluoro-ß-D-arabinofuranosyl) uracil.

fazarabine    listen   (fuh-ZAR-uh-been)
An anticancer drug that is a type of antimetabolite.

FDA      
An agency in the U.S. federal government whose mission is to protect public health by making sure that food, cosmetics, and nutritional supplements are safe to use and truthfully labeled. The FDA also makes sure that drugs, medical devices, and equipment are safe and effective, and that blood for transfusions and transplant tissue are safe. Also called Food and Drug Administration.

FdCyd      
A substance being studied in the treatment of some types of cancer. It may prevent the growth of tumors by stopping cancer cells from dividing and by killing them. It is a type of antimetabolite. Also called 5-fluoro-2-deoxycytidine.

FDR      
The parents, brothers, sisters, or children of an individual. Also called first-degree relative.

febrile neutropenia    listen   (FEH-brile noo-troh-PEE-nee-uh)
A condition marked by fever and a lower-than-normal number of neutrophils in the blood. A neutrophil is a type of white blood cell that helps fight infection. Having too few neutrophils increases the risk of infection.

FEC      
An abbreviation for a chemotherapy combination used with other types of therapy to treat breast cancer, including breast cancer that has spread or come back. It includes the drugs fluorouracil, epirubicin hydrochloride, and cyclophosphamide. Also called FEC regimen.

FEC regimen    listen   (… REH-jih-men)
An abbreviation for a chemotherapy combination used with other types of therapy to treat breast cancer, including breast cancer that has spread or come back. It includes the drugs fluorouracil, epirubicin hydrochloride, and cyclophosphamide. Also called FEC.

fecal immunochemical test    listen   (FEE-kul IH-myoo-noh-KEH-mih-kul …)
A test that checks for occult (hidden) blood in the stool. Small samples of stool are placed on special cards and sent to a doctor or laboratory for testing. An antibody that binds to a blood protein called hemoglobin is used to detect any blood. Blood in the stool may be a sign of colorectal cancer or other problems, such as polyps, ulcers, or hemorrhoids. Also called FIT, iFOBT, immunoassay fecal occult blood test, immunochemical fecal occult blood test, and immunologic fecal occult blood test.

fecal incontinence    listen   (FEE-kul in-KON-tih-nents)
Inability to hold stool in the rectum.

fecal occult blood test    listen   (FEE-kul uh-KULT...)
A test that checks for occult (hidden) blood in the stool. Small samples of stool are placed on special cards and sent to a doctor or laboratory for testing. Blood in the stool may be a sign of colorectal cancer or other problems, such as polyps, ulcers, or hemorrhoids. Guaiac fecal occult blood test and immunochemical fecal occult blood test are two types of fecal occult blood tests. Guaiac fecal occult blood test uses a chemical substance called guaiac to check for blood in the stool. Immunochemical fecal occult blood test uses an antibody to check for blood in the stool. Also called FOBT.

feces    listen   (FEE-seez)
The material in a bowel movement. Feces is made up of undigested food, bacteria, mucus, and cells from the lining of the intestines. Also called stool.

Femara    listen   (FEH-muh-ruh)
A drug used to treat certain types of breast cancer in postmenopausal women. It is also being studied in the treatment of other types of cancer. Femara lowers the amount of estrogen made by the body. This may stop the growth of cancer cells that need estrogen to grow. Femara is a type of aromatase inhibitor. Also called letrozole.

fenofibrate    listen   (FEH-noh-FY-brayt)
A drug used to treat high levels of cholesterol and triglycerides in the blood. Fenofibrate is being studied in the treatment of advanced cancers in young patients and in the treatment of other conditions. It is a type of antilipidemic agent. Also called Lofibra and TriCor.

fenretinide    listen   (fen-REH-tih-nide)
A substance being studied in the treatment and prevention of some types of cancer. Fenretinide may cause ceramide (a wax-like substance) to build up in tumor cells and kill them. It is a type of retinoid, which are substances related to vitamin A.

fenretinide LXS    listen   (fen-REH-tih-nide…)
A powdered form of fenretinide that is being studied in the treatment of neuroblastoma. It may be used by the body more easily than the pill form. Fenretinide may cause ceramide (a wax-like substance) to build up in tumor cells and kill them. It is a type of retinoid, which are substances related to vitamin A. Also called fenretinide Lym-X-Sorb.

fenretinide Lym-X-Sorb    listen   (fen-REH-tih-nide…)
A powdered form of fenretinide that is being studied in the treatment of neuroblastoma. It may be used by the body more easily than the pill form. Fenretinide may cause ceramide (a wax-like substance) to build up in tumor cells and kill them. It is a type of retinoid, which are substances related to vitamin A. Also called fenretinide LXS.

fentanyl citrate    listen   (FEN-tuh-nil SIH-trayt)
A drug used to treat severe cancer pain that occurs even though the patient is already taking opioids. It is also used during anesthesia for surgery. Fentanyl citrate binds to opioid receptors in the central nervous system. It is a type of analgesic agent and a type of opioid.

fentanyl sublingual spray    listen   (FEN-tuh-nil sub-LING-wul …)
A form of the drug fentanyl that is sprayed under the tongue and then absorbed into the blood. It is being studied in the treatment of breakthrough pain (pain that occurs even when pain-control medication is already being used) in cancer patients. Fentanyl is a type of opioid analgesic.

ferritin    listen   (FAYR-ih-tin)
A protein that binds to iron and stores it for use by the body. Ferritin is found in cells in the liver, spleen, bone marrow, and other tissues.

Ferrlecit    listen   (FAYR-leh-sit)
A form of the mineral iron that is used to treat anemia caused by low amounts of iron in the blood. Anemia is a condition in which the number of red blood cells is below normal. Ferrlecit is a type of hematinic and a dietary supplement. Also called sodium ferric gluconate.

ferrous sulfate    listen   (FAYR-us SUL-fayt)
A form of the mineral iron that is used to treat anemia caused by low amounts of iron in the blood. Anemia is a condition in which the number of red blood cells is below normal. Ferrous sulfate is a type of hematinic and a type of dietary supplement.

fertile    listen   (FER-til)
Able to produce children.

fertility    listen   (fer-TIH-lih-tee)
The ability to produce children.

fertility preservation    listen   (fer-TIH-lih-tee PREH-zer-VAY-shun)
A type of procedure used to help keep a person’s ability to have children. A fertility preservation procedure is done before a medical treatment that may cause infertility, such as radiation therapy or chemotherapy. Examples of fertility preservation procedures include sperm banking, egg freezing, in vitro fertilization with embryo freezing, and certain types of surgery for cervical and ovarian cancer.

ferumoxtran-10    listen   (fayr-yoo-MOX-tran…)
A substance being studied as a way of improving magnetic resonance imaging (MRI) in diagnosing cancer and finding lymph nodes to which cancer has spread. Ferumoxtran-10 is made of nanoparticles (ultrasmall pieces) of iron oxide coated with dextran (a type of sugar). It is injected into the blood of the patient and the particles collect in lymph nodes, liver, spleen, or brain tissue where they can be seen using MRI. Ferumoxtran-10 later breaks down and passes from the body in urine.

ferumoxytol    listen   (fayr-yoo-MOK-sih-tol)
A nanoparticle form of iron made in the laboratory that is being studied for use in iron replacement therapy, and as a contrast agent for magnetic resonance imaging. Contrast agents are substances that are injected into the body and taken up by certain tissues, making the tissues easier to see in imaging scans.

fetal    listen   (FEE-tul)
Having to do with a fetus. A fetus is an unborn baby that develops and grows inside the uterus. In humans, the fetal period begins 8 weeks after fertilization of an egg by a sperm and ends at birth.

fetus    listen   (FEE-tus)
In humans, an unborn baby that develops and grows inside the uterus (womb). The fetal period begins 8 weeks after fertilization of an egg by a sperm and ends at the time of birth.

fever    listen   (FEE-ver)
An increase in body temperature above normal (98.6 degrees F), usually caused by disease.

fexofenadine    listen   (FEK-soh-FEH-nuh-deen)
A drug used to treat certain allergy symptoms. It blocks a chemical released during an allergic response that causes itching, sneezing, runny nose, wheezing, and watery eyes. It is a type of antihistamine. Also called Allegra.

fiber    listen   (FY-ber)
In food, fiber is the part of fruits, vegetables, legumes, and whole grains that cannot be digested. The fiber in food may help prevent cancer. In the body, fiber refers to tissue made of long threadlike cells, such as muscle fiber or nerve fiber.

fiberoptic    listen   (FY-ber-OP-tik)
Describes the use of a coated, thin, clear, glass or plastic fiber that can carry light and send information, including images. In medicine, flexible fiberoptic instruments are used to look inside the body. Fiberoptics are also used to deliver laser light to tumors injected with a type of drug that kills cancer cells when it is exposed to laser light.

fibrin    listen   (FY-brin)
A protein involved in forming blood clots in the body. It is made from the protein fibrinogen and helps stop bleeding and heal wounds. Sometimes fibrin-like substances may be found in higher than normal amounts in the blood and urine of patients with some types of cancer or other conditions. Measuring the amount of these substances may help to check how well cancer treatment is working or if the cancer has gotten worse. Fibrin is a type of tumor marker.

fibrin sealant    listen   (FY-brin SEE-lent)
A substance used during surgery to help heal wounds. It contains proteins found in human blood that cause blood to clot. When fibrin sealant is placed on a wound, a clot forms. Fibrin sealant is being studied as a way to improve healing after lymph node removal in patients with cancer. It is a type of surgical glue.

fibrinogen    listen   (fy-BRIH-noh-jen)
A protein involved in forming blood clots in the body. It is made in the liver and forms fibrin. Fibrin is the main protein in a blood clot that helps stop bleeding and heal wounds. Sometimes fibrin-like substances may be found in higher than normal amounts in the blood and urine of patients with some types of cancer or other conditions. Measuring the amount of these substances may help to check how well cancer treatment is working or if the cancer has gotten worse. Fibrinogen is a type of tumor marker.

fibroadenoma    listen   (FY-broh-a-deh-NOH-muh)
A benign (not cancer) tumor that usually forms in the breast from both fibrous and glandular tissue. Fibroadenomas are the most common benign breast tumors.

fibroblast    listen   (FY-broh-blast)
A connective tissue cell that makes and secretes collagen proteins.

fibrocystic breast changes    listen   (FY-broh-SIS-tik brest CHAYN-jiz)
A common condition marked by benign (not cancer) changes in breast tissue. These changes may include irregular lumps or cysts, breast discomfort, sensitive nipples, and itching. These symptoms may change throughout the menstrual cycle and usually stop after menopause. Also called benign breast disease, fibrocystic breast disease, and mammary dysplasia.

fibrocystic breast disease    listen   (FY-broh-SIS-tik brest dih-ZEEZ)
A common condition marked by benign (not cancer) changes in breast tissue. These changes may include irregular lumps or cysts, breast discomfort, sensitive nipples, and itching. These symptoms may change throughout the menstrual cycle and usually stop after menopause. Also called benign breast disease, fibrocystic breast changes, and mammary dysplasia.

fibroid    listen   (FY-broyd)
A benign smooth-muscle tumor, usually in the uterus or gastrointestinal tract. Also called leiomyoma.

fibromatosis    listen   (fy-BROH-muh-TOH-sis)
A condition in which multiple fibromas develop. Fibromas are tumors (usually benign) that affect connective tissue.

fibrosarcoma    listen   (FY-broh-sar-KOH-muh)
A type of soft tissue sarcoma that begins in fibrous tissue, which holds bones, muscles, and other organs in place.

fibrosis    listen   (fy-BROH-sis)
The growth of fibrous tissue.

fibrous    listen   (FY-brus)
Containing or resembling fibers.

fiducial marker    listen   (fih-DOO-shul MAR-ker)
A medical device or small object placed in or on the body to mark an area for radiation treatment or surgery. For example, tiny gold seeds may be put into the prostate to mark a tumor before radiation therapy. This allows the doctor to give higher doses of radiation to the tumor with less harm to nearby healthy tissue.

fifth cranial nerve    listen   (fith KRAY-nee-ul nerv)
The main sensory nerve of the head and face, and the motor nerve of the muscles used in chewing. Also called trigeminal nerve.

FIHP      
A rare inherited condition in which one or more tumors form in the parathyroid glands (four pea-sized organs found on the thyroid) and cause them to make too much parathyroid hormone. The increased parathyroid hormone causes a loss of calcium from the bones and too much calcium in the blood. Also called familial isolated hyperparathyroidism.

filgrastim    listen   (fil-GRAS-tim)
A colony-stimulating factor that stimulates the production of neutrophils (a type of white blood cell). It is a cytokine that is a type of hematopoietic (blood-forming) agent. Also called G-CSF and granulocyte colony-stimulating factor.

filgrastim-SD/01    listen   (fil-GRAS-tim ...)
A drug used to increase numbers of white blood cells in patients who are receiving chemotherapy. It is a type of colony-stimulating factor. Also called Neulasta and pegfilgrastim.

filler    listen   (FIH-ler)
An inactive substance used to make a product bigger or easier to handle. For example, fillers are often used to make pills or capsules because the amount of active drug is too small to be handled conveniently.

film mammography    listen   (... ma-MAH-gruh-fee)
The use of x-rays to create a picture of the breast on a film.

filter    listen   (FIL-ter)
A material or device that allows certain substances to pass through it, while keeping other substances out. Filters may be used in cigarettes to help trap tar and other harmful substances found in tobacco smoke.

finasteride    listen   (fih-NAS-teh-ride)
A drug used to reduce the amount of male hormone (testosterone) produced by the body.

fine-needle aspiration biopsy    listen   (... NEE-dul AS-pih-RAY-shun BY-op-see)
The removal of tissue or fluid with a thin needle for examination under a microscope. Also called FNA biopsy.

Firmagon    listen   (FER-muh-gon)
A drug that is used to treat advanced prostate cancer and is also being studied in the treatment of benign prostatic hyperplasia. Firmagon binds to gonadotropin-releasing hormone (GnRH) receptors in the pituitary gland. This causes the body to stop making testosterone, which prostate cancer needs to grow. Firmagon is a type of GnRH antagonist. Also called degarelix.

first-degree relative    listen   (first-deh-GREE REH-luh-tiv)
The parents, brothers, sisters, or children of an individual. Also called FDR.

first-line therapy    listen   (... THAYR-uh-pee)
The first treatment given for a disease. It is often part of a standard set of treatments, such as surgery followed by chemotherapy and radiation. When used by itself, first-line therapy is the one accepted as the best treatment. If it doesn’t cure the disease or it causes severe side effects, other treatment may be added or used instead. Also called induction therapy, primary therapy, and primary treatment.

FISH    listen  
A laboratory technique used to look at genes or chromosomes in cells and tissues. Pieces of DNA that contain a fluorescent dye are made in the laboratory and added to cells or tissues on a glass slide. When these pieces of DNA bind to specific genes or areas of chromosomes on the slide, they light up when viewed under a microscope with a special light. Also called fluorescence in situ hybridization.

fistula    listen   (FIS-chuh-luh)
An abnormal opening or passage between two organs or between an organ and the surface of the body. Fistulas may be caused by injury, infection, or inflammation, or may be created during surgery.

FIT      
A test that checks for occult (hidden) blood in the stool. Small samples of stool are placed on special cards and sent to a doctor or laboratory for testing. An antibody that binds to a blood protein called hemoglobin is used to detect any blood. Blood in the stool may be a sign of colorectal cancer or other problems, such as polyps, ulcers, or hemorrhoids. Also called fecal immunochemical test, iFOBT, immunoassay fecal occult blood test, immunochemical fecal occult blood test, and immunologic fecal occult blood test.

five element acupuncture    listen   (… EH-leh-ment AK-yoo-PUNK-cher)
An ancient form of acupuncture based on the principle that there are five universal elements (wood, fire, earth, metal, and water) that affect a person's emotions, personality, health, and response to treatment. Each person is affected by one element more than the others. Also called traditional acupuncture.

five-year survival rate    listen   (... ser-VY-vul ...)
The percentage of people in a study or treatment group who are alive five years after they were diagnosed with or started treatment for a disease, such as cancer. The disease may or may not have come back.

FK463      
An antibiotic/antifungal drug used to treat infection.

Flagyl    listen   (FLA-jul)
A drug that is used to treat infection and is being studied in the treatment of cancer. It is type of antibacterial, antiprotozoal, and anthelmintic. Also called metronidazole.

flavonoid    listen   (FLAY-vuh-noyd)
A member of a group of substances found in many plants and plant-based foods. Flavonoids have shown antioxidant effects.

flavopiridol    listen   (FLAH-voh-PIH-rih-dol)
A substance being studied in the treatment of several types of cancer. It stops cells from dividing and may kill cancer cells. It is a type of cyclin-dependent kinase (CDK) inhibitor. Also called alvocidib and HMR 1275.

flaxseed    listen   (FLAX-seed)
The seed of the flax plant. It is a rich source of omega-3 fatty acid, fiber, and a compound called lignin. It is being studied in the prevention of several types of cancer. Also called linseed.

flecainide    listen   (FLEH-kuh-nide)
A drug used to treat abnormal heart rhythms. It may also relieve neuropathic pain, the burning, stabbing, or stinging pain that may arise from damage to nerves caused by some types of cancer or cancer treatment.

Flomax    listen   (FLOH-max)
A drug used to treat urinary problems caused by an enlarged prostate. Flomax relaxes the muscles of the prostate and bladder, which helps the flow of urine. It is a type of alpha blocker. Also called tamsulosin and tamsulosin hydrochloride.

flow chart    listen   (floh …)
A diagram that shows the order of steps in a complex process. Also called flow sheet.

flow cytometry    listen   (floh sy-TAH-meh-tree)
A method of measuring the number of cells in a sample, the percentage of live cells in a sample, and certain characteristics of cells, such as size, shape, and the presence of tumor markers on the cell surface. The cells are stained with a light-sensitive dye, placed in a fluid, and passed in a stream before a laser or other type of light. The measurements are based on how the light-sensitive dye reacts to the light.

flow sheet    listen   (floh …)
A diagram that shows the order of steps in a complex process. Also called flow chart.

floxuridine    listen   (flox-YOOR-ih-deen)
A drug used in the treatment of cancer. It is a type of antimetabolite.

flt3L      
A drug that increases the number of immune cells and may stimulate the immune system to kill cancer cells.

fluconazole    listen   (floo-KAH-nuh-zole)
A drug that treats infections caused by fungi.

flucytosine    listen   (floo-SY-toh-seen)
A drug that treats infections caused by fungi.

Fludara    listen   (floo-DAR-uh)
A drug used to treat B-cell chronic lymphocytic leukemia (CLL) that has not responded to treatment with other anticancer drugs or that has gotten worse. It is also being studied in the treatment of other types of cancer. Fludara blocks cells from making DNA and may kill cancer cells. It is a type of purine antagonist and a type of ribonucleotide reductase inhibitor. Also called fludarabine phosphate.

fludarabine    listen   (floo-DAR-uh-been)
The active ingredient in a drug used to treat B-cell chronic lymphocytic leukemia (CLL) that has not responded to treatment with other anticancer drugs or that has gotten worse. Fludarabine blocks cells from making DNA and may kill cancer cells. It is a type of purine antagonist and a type of ribonucleotide reductase inhibitor.

fludarabine phosphate    listen   (floo-DAR-uh-been FOS-fayt)
A drug used to treat B-cell chronic lymphocytic leukemia (CLL) that has not responded to treatment with other anticancer drugs or that has gotten worse. It is also being studied in the treatment of other types of cancer. Fludarabine phosphate blocks cells from making DNA and may kill cancer cells. It is a type of purine antagonist and a type of ribonucleotide reductase inhibitor. Also called Fludara.

fludeoxyglucose F 18    listen   (FLOO-dee-OK-see-GLOO-kose …)
The radioactive form of glucose used in positron emission tomography (PET), a diagnostic imaging procedure.

fludrocortisone    listen   (floo-droh-KOR-tih-sone)
A synthetic corticosteroid. It is used to replace steroid hormones normally produced by the adrenal gland.

fluid    listen   (FLOO-id)
A substance that flows smoothly and takes the shape of its container. Liquids and gases are fluids.

fluid deprivation test    listen   (FLOO-id DEH-prih-VAY-shun …)
A test to measure how much urine is made and how concentrated it becomes when no fluid is given to a patient for a certain amount of time. This test is used to see how well the kidneys work and to help diagnose diabetes insipidus (a condition in which a person is very thirsty and makes large amounts of urine). Also called water deprivation test.

fluid replacement therapy    listen   (FLOO-id reh-PLAYS-ment THAYR-uh-pee)
Treatment to replace fluids that are lost from the body because of surgery, injury, dehydration, disease, or other conditions.

fluorescence in situ hybridization    listen   (floor-EH-sents in SY-too HY-brih-dih-ZAY-shun)
A laboratory technique used to look at genes or chromosomes in cells and tissues. Pieces of DNA that contain a fluorescent dye are made in the laboratory and added to cells or tissues on a glass slide. When these pieces of DNA bind to specific genes or areas of chromosomes on the slide, they light up when viewed under a microscope with a special light. Also called FISH.

fluorescence microscopy    listen   (floor-EH-sents my-KROS-koh-pee)
The use of a special microscope to see objects that give off fluorescent light. For example, cells or tissue can be treated with a substance that contains a fluorescent dye. The dye lights up when viewed under a microscope with a special light.

fluorescence-guided surgery    listen   (floor-EH-sents-GY-ded SER-juh-ree)
Surgery that uses a fluorescent substance and a special microscope to show tumor margins (edges) so that more of the tumor can be removed. The substance is given by mouth and is taken up by fast-growing cells. These cells light up when seen under a microscope with a special blue light. This may help doctors to remove as much tumor as possible without harming healthy tissue. Fluorescence-guided surgery is being studied in the treatment of certain types of brain tumors.

fluoride    listen   (FLOOR-ide)
A form of the element fluorine that helps prevent tooth decay. Fluoride may be naturally present in drinking water or may be added to it. Fluoride may also be put directly on the teeth, as a gel, toothpaste, or a rinse.

fluorine F 18 EF5    listen   (FLOOR-een...)
A substance being studied in positron emission tomography (PET) imaging to detect tumor hypoxia (a low level of oxygen in the tumor). This may help predict how the tumor will respond to treatment. It is a type of radiopharmaceutical. Also called 18F-EF5.

fluorine F 18 FEQA    listen   (FLOOR-een …)
A radioactive substance being studied in positron emission tomography (PET) imaging to detect cancer and to monitor the response of some types of cancer to treatment. Fluorine F 18 FEQA attaches to the epidermal growth factor receptor (EGFR) found on the surface of some tumor cells. It is a type of radiopharmaceutical.

fluorine F 18 fluoromethylcholine    listen   (FLOOR-een … FLOOR-oh-MEH-thul-KOH-leen)
A radioactive substance being studied in PET imaging to detect certain types of cancer. Fluorine F 18 fluoromethylcholine gets taken up by cells in the body and more of it is taken up by tumor cells than by normal cells. A PET scanner is used to detect which cells in the body have taken up fluorine F 18 fluoromethylcholine. It is a type of radioimaging agent. Also called 18F-choline, 18F-fluoromethylcholine, and 18F-FMCH.

fluorine F 18 sodium fluoride PET    listen   (FLOOR-een … SOH-dee-um FLOOR-ide …)
A procedure used to find out if cancer has spread to the bone. A small amount of a radioactive substance called fluorine F 18 sodium fluoride is injected into a vein. A PET scan is then used to make detailed pictures of the bones. Bones with cancer in them take up more fluorine F18 sodium fluoride than normal bones do. Also called F 18 sodium fluoride positron emission tomography and F-18 NaF PET.

Fluoroplex    listen   (FLOOR-oh-plex)
A drug used to treat cancers of the breast, stomach, and pancreas, and certain types of colorectal and head and neck cancers. It is also used in a cream to treat basal cell skin cancer and actinic keratosis (a skin condition that may become cancer). It is being studied in the treatment of other conditions and types of cancer. Fluoroplex stops cells from making DNA and it may kill cancer cells. It is a type of antimetabolite. Also called 5-fluorouracil, 5-FU, Adrucil, Efudex, and fluorouracil.

fluoropyrimidine    listen   (FLOOR-oh-py-RIH-mih-deen)
One of a group of substances used to treat cancer. A fluoropyrimidine is a type of antimetabolite. Examples are capecitabine, floxuridine, and fluorouracil (5-FU).

fluoroquinolone    listen   (FLOOR-oh-KWIH-noh-lone)
A type of drug used to prevent and treat infections.

fluoroscope    listen   (FLOOR-oh-skope)
An x-ray machine that makes it possible to see internal organs in motion.

fluoroscopy    listen   (floor-OS-koh-pee)
An x-ray procedure that makes it possible to see internal organs in motion.

fluorothymidine F 18    listen   (FLOOR-oh-THY-mih-DEEN…)
A radioactive substance being studied in the diagnosis of cancer. Fluorothymidine F 18 is injected into the blood and builds up in cells that are dividing, including cancer cells. The radiation that it gives off as it decays (breaks down) helps make clear pictures of tumors during positron emission tomography (PET) scans. It is a type of radiopharmaceutical. Also called 18F-FLT and 3’-deoxy-3’-(18F) fluorothymidine.

fluorouracil    listen   (floor-oh-YOOR-uh-sil)
A drug used to treat cancers of the breast, stomach, and pancreas, and certain types of colorectal and head and neck cancers. It is also used in a cream to treat basal cell skin cancer and actinic keratosis (a skin condition that may become cancer). It is being studied in the treatment of other conditions and types of cancer. Fluorouracil stops cells from making DNA and it may kill cancer cells. It is a type of antimetabolite. Also called 5-fluorouracil, 5-FU, Adrucil, Efudex, and Fluoroplex.

fluoxetine    listen   (floo-OK-seh-teen)
A drug used to treat depression. It is a type of antidepressant.

fluphenazine    listen   (floo-FEH-nuh-zeen)
A drug that is used to treat mental and emotional disorders and is being studied in the treatment of multiple myeloma. Fluphenazine may stop tumor growth by keeping myeloma cells from dividing and causing them to die. It is a type of antipsychotic. Also called fluphenazine hydrochloride.

fluphenazine hydrochloride    listen   (floo-FEH-nuh-ZEEN HY-droh-KLOR-ide)
A drug that is used to treat mental and emotional disorders and is being studied in the treatment of multiple myeloma. Fluphenazine hydrochloride may stop tumor growth by keeping myeloma cells from dividing and causing them to die. It is a type of antipsychotic. Also called fluphenazine.

flutamide    listen   (FLOO-tuh-mide)
A drug used with another drug to treat certain types of prostate cancer. Flutamide binds to proteins called androgen receptors, which are found in some prostate cancer cells, and keeps androgens (male hormones) from binding to the receptors. This blocks the ability of androgens to cause prostate cancer cells to grow. Flutamide is a type of antiandrogen. Also called Eulexin.

fluvoxamine    listen   (floo-VOK-suh-meen)
A drug used to treat obsessive-compulsive disorder. It is a type of antidepressant agent and selective serotonin reuptake inhibitor (SSRI). Also called Luvox.

FMISO      
A radioactive substance being studied as an imaging agent in head and neck cancers and other types of cancer. It binds to large molecules in tumor cells that have a low level of oxygen. Radiation given off by FMISO is detected by a PET scan. The amount of FMISO in the tumor may help decide the best treatment and help predict whether the cancer will come back after treatment. FMISO is a type of radioimaging agent. Also called 18F-fluoromisonidazole and 18F-MISO.

FNA biopsy    listen   (... BY-op-see)
The removal of tissue or fluid with a thin needle for examination under a microscope. Also called fine-needle aspiration biopsy.

FOBT      
A test that checks for occult (hidden) blood in the stool. Small samples of stool are placed on special cards and sent to a doctor or laboratory for testing. Blood in the stool may be a sign of colorectal cancer or other problems, such as polyps, ulcers, or hemorrhoids. Guaiac FOBT and immunochemical FOBT are two types of FOBTs. Guaiac FOBT uses a chemical substance called guaiac to check for blood in the stool. Immunochemical FOBT uses an antibody to check for blood in the stool. Also called fecal occult blood test.

focal    listen   (FOH-kul)
In terms of cancer, limited to a specific area.

folate    listen   (FOH-layt)
A nutrient in the vitamin B complex that the body needs in small amounts to function and stay healthy. Folate helps to make red blood cells. It is found in whole-grain breads and cereals, liver, green vegetables, orange juice, lentils, beans, and yeast. Folate is water-soluble (can dissolve in water) and must be taken in every day. Not enough folate can cause anemia (a condition in which the number of red blood cells is below normal), diseases of the heart and blood vessels, and defects in the brain and spinal cord in a fetus. Folate is being studied with vitamin B12 in the prevention and treatment of cancer. Also called folic acid.

folate antagonist    listen   (FOH-layt an-TA-guh-nist)
A type of drug that stops cells from using folic acid to make DNA and may kill cancer cells. Certain folate antagonists are used to treat some types of cancer and inflammatory conditions, such as rheumatoid arthritis. Also called antifolate and folic acid antagonist.

FOLFIRI    listen  
An abbreviation for a chemotherapy combination used to treat advanced colorectal cancer that has spread. It is also being studied in the treatment of other types of cancer. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, and irinotecan hydrochloride. Also called FOLFIRI regimen.

FOLFIRI regimen    listen   (… REH-jih-men)
An abbreviation for a chemotherapy combination used to treat advanced colorectal cancer that has spread. It is also being studied in the treatment of other types of cancer. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, and irinotecan hydrochloride. Also called FOLFIRI.

FOLFIRI-Avastin regimen    listen   (…uh-VAS-tin REH-jih-men)
A chemotherapy combination used as an initial treatment of colorectal cancer that has spread. It includes the drugs leucovorin (folinic acid), fluorouracil, irinotecan hydrochloride, and bevacizumab. Also called FOLFIRI-bevacizumab and FOLFIRI-bevacizumab regimen.

FOLFIRI-bevacizumab    listen   (... beh-vuh-SIH-zoo-mab)
A chemotherapy combination used as an initial treatment of colorectal cancer that has spread. It includes the drugs leucovorin (folinic acid), fluorouracil, irinotecan hydrochloride, and bevacizumab. Also called FOLFIRI-Avastin regimen and FOLFIRI-bevacizumab regimen.

FOLFIRI-bevacizumab regimen    listen   (…. beh-vuh-SIH-zoo-mab REH-jih-men)
A chemotherapy combination used as an initial treatment of colorectal cancer that has spread. It includes the drugs leucovorin (folinic acid), fluorouracil, irinotecan hydrochloride, and bevacizumab. Also called FOLFIRI-Avastin regimen and FOLFIRI-bevacizumab.

FOLFIRI-cetuximab    listen   (... seh-TUK-sih-mab)
A chemotherapy combination used to treat a certain type of colorectal cancer that has spread to other parts of the body. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, irinotecan hydrochloride, and cetuximab. Also called FOLFIRI-cetuximab regimen.

FOLFIRI-cetuximab regimen    listen   (... seh-TUK-sih-mab REH-jih-men)
A chemotherapy combination used to treat a certain type of colorectal cancer that has spread to other parts of the body. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, irinotecan hydrochloride, and cetuximab. Also called FOLFIRI-cetuximab.

FOLFIRINOX    listen  
An abbreviation for a chemotherapy combination used to treat pancreatic cancer that has spread to other parts of the body. It includes the drugs leucovorin calcium, fluorouracil, irinotecan hydrochloride, and oxaliplatin. Also called FOLFIRINOX regimen.

FOLFIRINOX regimen    listen   (… REH-jih-men)
An abbreviation for a chemotherapy combination used to treat pancreatic cancer that has spread to other parts of the body. It includes the drugs leucovorin calcium, fluorouracil, irinotecan hydrochloride, and oxaliplatin. Also called FOLFIRINOX.

FOLFOX    listen  
An abbreviation for a combination chemotherapy regimen that is used to treat colorectal cancer. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, and oxaliplatin. There are several different FOLFOX regimens, including FOLFOX-4, FOLFOX-6, modified FOLFOX-6 (mFOLFOX-6), and FOLFOX-7. They differ in the doses and ways in which the three drugs are given. Also called FOLFOX regimen.

FOLFOX regimen    listen   (… REH-jih-men)
An abbreviation for a combination chemotherapy regimen that is used to treat colorectal cancer. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, and oxaliplatin. There are several different FOLFOX regimens, including FOLFOX-4, FOLFOX-6, modified FOLFOX-6 (mFOLFOX-6), and FOLFOX-7. They differ in the doses and ways in which the three drugs are given. Also called FOLFOX.

FOLFOX-4    listen  
An abbreviation for a combination chemotherapy regimen that is used to treat colorectal cancer. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, and oxaliplatin. There are several different FOLFOX regimens that differ in the doses and ways in which the three drugs are given. Also called FOLFOX-4 regimen.

FOLFOX-4 regimen    listen   (... REH-jih-men)
An abbreviation for a combination chemotherapy regimen that is used to treat colorectal cancer. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, and oxaliplatin. There are several different FOLFOX regimens that differ in the doses and ways in which the three drugs are given. Also called FOLFOX-4.

FOLFOX-6    listen  
An abbreviation for a combination chemotherapy regimen that is used to treat colorectal cancer. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, and oxaliplatin. There are several different FOLFOX regimens that differ in the doses and ways in which the three drugs are given. Also called FOLFOX-6 regimen.

FOLFOX-6 regimen    listen   (... REH-jih-men)
An abbreviation for a combination chemotherapy regimen that is used to treat colorectal cancer. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, and oxaliplatin. There are several different FOLFOX regimens that differ in the doses and ways in which the three drugs are given. Also called FOLFOX-6.

FOLFOX-7    listen  
An abbreviation for a combination chemotherapy regimen that is used to treat colorectal cancer. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, and oxaliplatin. There are several different FOLFOX regimens that differ in the doses and ways in which the three drugs are given. Also called FOLFOX-7 regimen.

FOLFOX-7 regimen    listen   (... REH-jih-men)
An abbreviation for a combination chemotherapy regimen that is used to treat colorectal cancer. It includes the drugs leucovorin calcium (folinic acid), fluorouracil, and oxaliplatin. There are several different FOLFOX regimens that differ in the doses and ways in which the three drugs are given. Also called FOLFOX-7.

folic acid    listen   (FOH-lik A-sid)
A nutrient in the vitamin B complex that the body needs in small amounts to function and stay healthy. Folic acid helps to make red blood cells. It is found in whole-grain breads and cereals, liver, green vegetables, orange juice, lentils, beans, and yeast. Folic acid is water-soluble (can dissolve in water) and must be taken in every day. Not enough folic acid can cause anemia (a condition in which the number of red blood cells is below normal), diseases of the heart and blood vessels, and defects in the brain and spinal cord in a fetus. Folic acid is being studied with vitamin B12 in the prevention and treatment of cancer. Also called folate.

folic acid antagonist    listen   (FOH-lik A-sid an-TA-guh-nist)
A type of drug that stops cells from using folic acid to make DNA and may kill cancer cells. Certain folic acid antagonists are used to treat some types of cancer and inflammatory conditions, such as rheumatoid arthritis. Also called antifolate and folate antagonist.

folinic acid    listen   (foh-LIN-ik A-sid)
The active ingredient in a drug used to lessen the toxic effects of substances that block the action of folic acid, especially the anticancer drug methotrexate. Folinic acid is used to treat some types of anemia and is also used with fluorouracil to treat colorectal cancer. It is also being studied in the treatment of other types of cancer and other conditions. Folinic acid is a form of folic acid. It is a type of chemoprotective agent and a type of chemosensitizing agent. Also called leucovorin.

follicle    listen   (FAH-lih-kul)
A sac or pouch-like cavity formed by a group of cells. In the ovaries, one follicle contains one egg. In the skin, one follicle contains one hair.

follicle-stimulating hormone    listen   (FAH-lih-kul-STIM-yoo-LAY-ting HOR-mone)
A hormone made in the pituitary gland. In females, it acts on the ovaries to make the follicles and eggs grow. In males, it acts on the testes to make sperm. Also called follitropin and FSH.

follicular large cell lymphoma    listen   (fuh-LIH-kyoo-ler larj sel lim-FOH-muh)
A rare type of non-Hodgkin lymphoma (cancer of the lymphatic system) with large cells that look cleaved (split) or non-cleaved under the microscope. It is an indolent (slow-growing) type of lymphoma.

follicular lymphoma    listen   (fuh-LIH-kyoo-ler lim-FOH-muh)
A type of B-cell non-Hodgkin lymphoma (cancer of the immune system) that is usually indolent (slow-growing). The tumor cells grow as groups to form nodules. There are several subtypes of follicular lymphoma.

follicular mixed cell lymphoma    listen   (fuh-LIH-kyoo-ler mikst sel lim-FOH-muh)
An indolent (slow-growing) type of B-cell non-Hodgkin lymphoma (cancer of the lymphatic system) in which there are both small and large cancer cells.

follicular thyroid cancer    listen   (fuh-LIH-kyoo-ler THY-royd KAN-ser)
Cancer that forms in follicular cells in the thyroid. It grows slowly and is highly treatable.

folliculitis    listen   (fuh-LIH-kyoo-LY-tis)
Inflammation of a follicle (a sac or pouch-like cavity), usually a hair follicle.

follitropin    listen   (FAH-lih-TROH-pin)
A hormone made in the pituitary gland. In females, it acts on the ovaries to make the follicles and eggs grow. In males, it acts on the testes to make sperm. Also called follicle-stimulating hormone and FSH.

follow-up    listen   (FAH-loh-up)
Monitoring a person's health over time after treatment. This includes keeping track of the health of people who participate in a clinical study or clinical trial for a period of time, both during the study and after the study ends.

FOLOTYN    listen   (FOH-loh-tin)
A drug used in the treatment of peripheral T-cell lymphoma (a fast-growing form of non-Hodgkin lymphoma). It is also being studied in the treatment of other types of cancer. FOLOTYN may block the growth of cancer cells and cause them to die. It is a type of dihydrofolate reductase (DHFR) inhibitor. Also called pralatrexate.

fondaparinux    listen   (fon-duh-PAYR-ih-nux)
A drug used to prevent blood clots from forming inside blood vessels in the leg. It is being studied in the prevention of blood clots in some cancer patients, including women having surgery for cancer of the reproductive tract. It is a type of anticoagulant. Also called Arixtra and fondaparinux sodium.

fondaparinux sodium    listen   (fon-duh-PAYR-ih-nux SOH-dee-um)
A drug used to prevent blood clots from forming inside blood vessels in the leg. It is being studied in the prevention of blood clots in some cancer patients, including women having surgery for cancer of the reproductive tract. It is a type of anticoagulant. Also called Arixtra and fondaparinux.

Food and Drug Administration    listen   (... ad-MIH-nih-STRAY-shun)
An agency in the U.S. federal government whose mission is to protect public health by making sure that food, cosmetics, and nutritional supplements are safe to use and truthfully labeled. The Food and Drug Administration also makes sure that drugs, medical devices, and equipment are safe and effective, and that blood for transfusions and transplant tissue are safe. Also called FDA.

foreign    listen   (FOR-in)
In medicine, foreign describes something that comes from outside the body. A foreign substance in the body’s tissues, such as a bacterium or virus, may be recognized by the immune system as not belonging to the body. This causes an immune response. Other foreign substances in the body, such as artificial joints, are designed to not cause an immune response.

foreskin    listen   (FOR-skin)
The loose skin that covers the head of the penis.

foretinib    listen   (for-eh-TIH-nib)
A substance being studied in the treatment of cancer. Foretinib blocks enzymes involved in the growth and spread of tumor cells. It may also prevent the growth of new blood vessels that tumors need to grow. It is a type of tyrosine kinase inhibitor and a type of antiangiogenesis agent. Also called MET/VEGFR-2 inhibitor GSK1363089 and XL880.

Form FDA 1572-Statement of Investigator    listen   (... STAYT-ment … in-VES-tih-GAY-ter)
A form that must be filed by an investigator running a clinical trial to study a new drug or agent. The investigator agrees to follow the U.S. Food and Drug Administration (FDA) Code of Federal Regulations for the clinical trial. The investigator verifies that he or she has the experience and background needed to conduct the trial and that it will be done in a way that is ethical and scientifically sound. Also called 1572 form.

formaldehyde    listen   (for-MAL-deh-hide)
A chemical used in manufacturing and chemical industries, and as a preservative by anatomists, embalmers, and pathologists. Being exposed to formaldehyde may increase the risk of developing leukemia and brain cancer.

forodesine    listen   (FOR-oh-deh-seen)
A substance being studied in the treatment of some types of leukemia and lymphoma. It is a type of purine nucleoside phosphorylase (PNP) inhibitor. Also called BCX-1777 and forodesine hydrochloride.

forodesine hydrochloride    listen   (FOR-oh-deh-seen HY-droh-KLOR-ide)
A substance being studied in the treatment of some types of leukemia and lymphoma. It is a type of purine nucleoside phosphorylase (PNP) inhibitor. Also called BCX-1777 and forodesine.

fortified food    listen   (FOR-tih-fide …)
A food that has extra nutrients added to it or has nutrients added that are not normally there. Examples are milk with vitamin D added and salt with iodine added.

Fosamax    listen   (FAH-suh-max)
A drug used to treat certain bone conditions, such as osteoporosis and Paget disease of the bone. It is also being studied in the treatment of hypercalcemia (high levels of calcium in the blood) and bone pain caused by cancer. Fosamax slows the breakdown of bone and prevents the loss of calcium. It is a type of bisphosphonate. Also called alendronate sodium.

fosaprepitant dimeglumine    listen   (FOS-uh-PREH-pih-tunt dy-MEG-loo-meen)
A drug used together with other drugs to prevent and control nausea and vomiting caused by cancer treatment. It is given in a vein. It is a type of antiemetic and a type of substance P/neurokinin 1 receptor antagonist. Also called Emend for Injection.

foscarnet sodium    listen   (fos-KAR-net SOH-dee-um)
A drug used to treat infections with herpesviruses in people whose immune systems are weakened by AIDS. It blocks the viruses from making copies of themselves. It is a type of antiviral agent. Also called Foscavir and phosphonoformate trisodium.

Foscavir    listen   (FOS-kuh-veer)
A drug used to treat infections with herpesviruses in people whose immune systems are weakened by AIDS. It blocks the viruses from making copies of themselves. It is a type of antiviral agent. Also called foscarnet sodium and phosphonoformate trisodium.

fostamatinib disodium    listen   (FOS-tuh-MA-tih-nib dy-SOH-dee-um)
A substance being studied in the treatment of cancer and certain other diseases, such as rheumatoid arthritis. It may block tumor cell signaling and growth. It is a type of tyrosine kinase inhibitor. Also called R788 sodium and Syk kinase inhibitor R-935788.

fotemustine    listen   (foh-teh-MUS-teen)
A substance being studied in the treatment of advanced melanoma, glioblastoma (a type of brain tumor) that has come back, and certain types of lymphoma. Fotemustine damages the cell’s DNA and may kill cancer cells. It is a type of alkylating agent and a type of nitrosourea.

FR901228      
A drug used to treat cutaneous T-cell lymphoma in patients who have been treated with other anticancer drugs. It is also being studied in the treatment of other types of cancer. FR901228 blocks certain enzymes, which may help kill cancer cells. It is a type of depsipeptide and a type of histone deacetylase inhibitor. Also called Istodax and romidepsin.

fractionation    listen   (FRAK-shuh-NAY-shun)
A way of dividing a total dose of radiation or chemotherapy into separate doses that are larger or smaller than usual.

Fragmin    listen   (FRAG-min)
A drug used to prevent blood clots from forming or to treat blood clots that have formed in patients with cancer or other conditions. Fragmin is a type of anticoagulant. Also called dalteparin and dalteparin sodium.

fragrance    listen   (FRAY-grunts)
A pleasant, sweet odor.

frankincense tree    listen   (FRAN-kin-SENTS…)
A tree that belongs to the incense tree family. The tree’s amber-colored resin is used in incense. The resin has anti-inflammatory effects and has been used to treat arthritis, asthma, and ulcerative colitis. It is also being studied in the treatment of brain tumors. Also called Boswellia serrata.

free flap    listen   (… flap)
A type of surgery used to rebuild the shape of the breast after a mastectomy. A tissue flap, including blood vessels, skin, fat, and sometimes muscle, is removed from one area of the body, such as the back or abdomen. It is then reattached to the chest to form a new breast mound. The blood vessels from the tissue are reconnected to blood vessels under the arm or in the chest. A free flap is a type of breast reconstruction.

free PSA    listen   (free …)
The amount of the protein prostate-specific antigen (PSA) in the blood that is not attached to other proteins. It is compared with the amount of PSA in the blood that is attached to other proteins. The amount of free PSA is higher in men with benign prostatic hyperplasia (BPH).The amount of PSA attached to other proteins is higher in men with prostate cancer.

free radical    listen   (free RA-dih-kul)
A type of unstable molecule that is made during normal cell metabolism (chemical changes that take place in a cell). Free radicals can build up in cells and cause damage to other molecules, such as DNA, lipids, and proteins. This damage may increase the risk of cancer and other diseases.

free radical scavenger    listen   (free RA-dih-kul SKA-ven-jer)
A substance, such as an antioxidant, that helps protect cells from the damage caused by free radicals. Free radicals are unstable molecules that are made during normal cell metabolism (chemical changes that take place in a cell). They can build up in cells and cause damage to other molecules. This damage may increase the risk of cancer and other diseases.

freeze-dried    listen   (freez-dride)
A method used to dry substances, such as food, to make them last longer. The substance is frozen and then dried in a vacuum.

fresolimumab    listen   (FREH-soh-LIM-yoo-mab)
A substance being studied in the treatment of breast cancer that has spread to other parts of the body. It is also being studied in the treatment of other cancers and conditions. Fresolimumab binds to a protein called transforming growth factor-beta (TGF-beta), which is found on some cancer cells. Fresolimumab may help keep cancer cells from growing and prevent the growth of new blood vessels that tumors need to grow. It is a type of monoclonal antibody and a type of antiangiogenesis agent. Also called anti-TGF-beta monoclonal antibody GC1008 and GC1008.

frontal sinus    listen   (FRUN-tul SY-nus)
A type of paranasal sinus (a hollow space in the bones around the nose). There are two, large frontal sinuses in the frontal bone, which forms the lower part of the forehead and reaches over the eye sockets and eyebrows. The frontal sinuses are lined with cells that make mucus to keep the nose from drying out.

fruit acid    listen   (froot A-sid)
One of a group of substances that are found in several types of fruit and in milk. They are used in skin care products to reduce wrinkles and soften the skin. Examples of fruit acids are glycolic acid, lactic acid, and citric acid. Also called AHA and alpha hydroxyl acid.

FSH      
A hormone made in the pituitary gland. In females, it acts on the ovaries to make the follicles and eggs grow. In males, it acts on the testes to make sperm. Also called follicle-stimulating hormone and follitropin.

Ftorafur    listen   (FTOR-uh-fer)
A substance being studied in the treatment of some types of cancer. It is a combination of tegafur and uracil. The tegafur is taken up by the cancer cells and breaks down into 5-FU, a substance that kills tumor cells. The uracil causes higher amounts of 5-FU to stay inside the cells and kill them. Ftorafur is a type of antimetabolite. Also called tegafur-uracil and UFT.

FU-LV      
An abbreviation for a chemotherapy combination used to treat colorectal cancer. It is also used with radiation therapy to treat esophageal cancer and stomach cancer. It includes the drugs fluorouracil and leucovorin calcium. Also called 5FU/LV and FU-LV regimen.

FU-LV regimen    listen   (… REH-jih-men)
An abbreviation for a chemotherapy combination used to treat colorectal cancer. It is also used with radiation therapy to treat esophageal cancer and stomach cancer. It includes the drugs fluorouracil and leucovorin calcium. Also called 5FU/LV and FU-LV.

fulguration    listen   (ful-guh-RAY-shun)
A procedure that uses heat from an electric current to destroy abnormal tissue, such as a tumor or other lesion. It may also be used to control bleeding during surgery or after an injury. The electric current passes through an electrode that is placed on or near the tissue. The tip of the electrode is heated by the electric current to burn or destroy the tissue. Fulguration is a type of electrosurgery. Also called electrocautery, electrocoagulation, and electrofulguration.

full blood count    listen   (… blud kownt)
A measure of the number of red blood cells, white blood cells, and platelets in the blood. The amount of hemoglobin (substance in the blood that carries oxygen) and the hematocrit (the amount of whole blood that is made up of red blood cells) are also measured. A full blood count is used to help diagnose and monitor many conditions. Also called blood cell count, CBC, and complete blood count.

fulvestrant    listen   (ful-VES-trunt)
A drug used to treat certain types of breast cancer in postmenopausal women. It is also being studied in the treatment of other types of cancer. Fulvestrant blocks estrogen activity in the body and is a type of antiestrogen. Also called Faslodex and ICI 182780.

functional magnetic resonance imaging    listen   (FUNK-shuh-nul mag-NEH-tik REH-zuh-nunts IH-muh-jing)
A noninvasive tool used to observe functioning in the brain or other organs by detecting changes in chemical composition, blood flow, or both.

functioning tumor    listen   (FUNK-shuh-ning TOO-mer)
A tumor that is found in endocrine tissue and makes hormones (chemicals that travel in the bloodstream and control the actions of other cells or organs).

fundoscopy    listen   (fun-DOS-koh-pee)
An exam that uses a magnifying lens and a light to check the fundus of the eye (back of the inside of the eye, including the retina and optic nerve). The pupils may be dilated (enlarged) with medicated eye drops so the doctor can see through the pupil to the back of the eye. Fundoscopy may be used to check for eye problems, such as glaucoma, macular degeneration, eye cancer, optic nerve problems, or eye injury. Also called funduscopy and ophthalmoscopy.

fundus    listen   (FUN-dus)
The larger part of a hollow organ that is farthest away from the organ's opening. The bladder, gallbladder, stomach, uterus, eye, and cavity of the middle ear all have a fundus.

funduscopy    listen   (fun-DUS-koh-pee)
An exam that uses a magnifying lens and a light to check the fundus of the eye (back of the inside of the eye, including the retina and optic nerve). The pupils may be dilated (enlarged) with medicated eye drops so the doctor can see through the pupil to the back of the eye. Funduscopy may be used to check for eye problems, such as glaucoma, macular degeneration, eye cancer, optic nerve problems, or eye injury. Also called fundoscopy and ophthalmoscopy.

fungating lesion    listen   (FUN-gayt-ing LEE-zhun)
A type of skin lesion that is marked by ulcerations (breaks on the skin or surface of an organ) and necrosis (death of living tissue) and that usually has a bad smell. This kind of lesion may occur in many types of cancer, including breast cancer, melanoma, and squamous cell carcinoma, and especially in advanced disease.

fungicide    listen   (FUN-jih-side)
Any substance used to kill fungi (plant-like organisms that do not make chlorophyll), such as yeast and molds.

fungus    listen   (FUN-gus)
A plant-like organism that does not make chlorophyll. Mushrooms, yeasts, and molds are examples. The plural is fungi.

fusion gene    listen   (FYOO-zhun jeen)
A gene made by joining parts of two different genes. Fusion genes may occur naturally in the body by transfer of DNA between chromosomes. For example, the BCR-ABL gene found in some types of leukemia is a fusion gene. Fusion genes can also be made in the laboratory by combining genes or parts of genes from the same or different organisms.

fusion protein    listen   (FYOO-zhun PROH-teen)
A protein made from a fusion gene, which is created by joining parts of two different genes. Fusion genes may occur naturally in the body by transfer of DNA between chromosomes. For example, the BCR-ABL gene found in some types of leukemia is a fusion gene that makes the BCR-ABL fusion protein. Fusion genes and proteins can also be made in the laboratory by combining genes or parts of genes from the same or different organisms.

Back to TopBack to Top