[ad-no-muh-tus or ad-uh-NO-muh-tus pa-lip]
a benign (not cancer) growth of abnormal glandular cells on the inner lining of an organ such as the colon. These can become cancer, so they are usually removed when found. For example, 3 types of adenomatous polyps that can grow in the colon are tubular, villous, and tuberovillous adenomas. In each type, the cells are arranged differently, but there is some overlap so that an adenoma can have both tubular and villous features. See also glandular cells, hyperplastic polyp, inflammatory polyp, polyp, tubular adenoma, tubulovillous adenoma, villous adenoma.