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| C CELL | A type of cell in the thyroid. C cells make calcitonin, a hormone that helps control the calcium level in the blood. | |||
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| C-11 CHOLINE PET-CT SCAN | A procedure in which a small amount of C-11 choline (a radioactive form of the vitamin choline) is injected into a vein. A scanner and a computer are used to make detailed pictures of areas inside the body where the C-11 choline collects. Cancer cells take up more C-11 choline than normal cells, so the pictures can be used to find cancer cells in the body. Also called carbon-11 choline PET-CT scan. | |||
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| C-ERBB-2 | The gene that controls cell growth by making the human epidermal growth factor receptor 2. Also called HER2/neu. | |||
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| C-FOS ANTISENSE OLIGONUCLEOTIDE | A substance that has been studied in the treatment of cancer and is being studied in the treatment of rheumatoid arthritis and certain skin conditions. It blocks the production of a protein called c-fos, which helps control cell growth. This may kill cancer cells that need c-fos to grow. It is a type of antisense oligonucleotide. Also called antisense c-fos. | |||
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| C-KIT RECEPTOR | A protein on the surface of some cells that binds to stem cell factor (a substance that causes certain types of cells to grow). Altered forms of this receptor may be associated with some types of cancer. Also called stem cell factor receptor. | |||
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| C-PEPTIDE | A substance made by the pancreas. C-peptide and insulin are both part of a larger molecule that gets split apart before being released into the blood. Abnormal blood levels of C-peptide may occur in certain diseases, such as diabetes or cancer. Also called connecting peptide. | |||
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| C-PEPTIDE SUPPRESSION TEST | A test used to help diagnose a type of pancreatic tumor called an insulinoma. After fasting, the patient receives an injection of insulin and the level of C-peptide (a substance released with insulin by the pancreas) in the blood is measured. In patients who have an insulinoma, the level of C-peptide is higher than normal. | |||
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| CA 19-9 ASSAY | A test that measures the level of CA 19-9 in the blood. CA 19-9 is a tumor marker released into the bloodstream from both cancer cells and normal cells. Higher than normal amounts of CA 19-9 in the blood can be a sign of gallbladder or pancreatic cancer or other conditions. | |||
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| CA-125 | A substance sometimes found in an increased amount in the blood, other body fluids, or tissues and that may suggest the presence of some types of cancer. | |||
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| CA-125 TEST | A blood test that measures the level of CA-125, a substance found in blood, other body fluids and some tissues. Increased levels of CA-125 may be a sign of cancer. | |||
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