polyp, in medicine, a benign tumor occurring in areas lined with mucous membrane such as the nose, gastrointestinal tract (especially the colon), and the uterus. Some polyps are pedunculated tumors, i.e., they grow on stems; others, attached by a broad base, are called sessile. Nasal polyps are usually associated with an allergic condition; since they interfere with breathing, it is advisable that they be removed. Uterine and gastrointestinal polyps are likely to cause bleeding, but, more important, they may undergo malignant degeneration and for this reason are also usually removed.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
More on polyp from Fact Monster:
- purple sail - purple sail: purple sail: see jellyfish; polyp and medusa.
- Portuguese man-of-war - Portuguese man-of-war: Portuguese man-of-war: see jellyfish; polyp and medusa.
- sea pansy - sea pansy sea pansy, fleshy, leaf-shaped colony of marine organisms belonging to the genus Renilla ...
- sea pen - sea pen sea pen, long, slender colonial organism of the same phylum as the jellyfish. Sea pen ...
- sea fan - sea fan sea fan, colonial marine animal forming erect, flattened, branching colonies in tropical ...
See more Encyclopedia articles on: Pathology