NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,863 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

immunoassay fecal occult blood test
(IH-myoo-noh-A-say 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. 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, FIT, iFOBT, immunochemical fecal occult blood test, and immunologic fecal occult blood test.