NCIt definition : A usually exophytic mass attached to the underlying tissue by a broad base or a thin
stalk. Polyps can be neoplastic or non-neoplastic. Neoplastic polyps usually represent
proliferations of the epithelium, and are commonly seen in the gastrointestinal tract.
Polyps of the gastrointestinal tract are often called adenomas, are associated with
dysplasia, and may eventually transform into carcinomas. Non-neoplastic polyps may
be inflammatory, degenerative, or the result of malformations.;
Alternative definition : NCI-GLOSS: A growth that protrudes from a mucous membrane.;