NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,812 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.

colon polyp
(KOH-lun PAH-lip)
An abnormal growth of tissue in the lining of the bowel. Polyps are a risk factor for colon cancer.

EnlargeColon polyps; shows two polyps (one flat and one pedunculated) inside the colon.  Inset shows photo of a pedunculated polyp.

Polyps in the colon. Some polyps have a stalk and others do not. Inset shows a photo of a polyp with a stalk.