polyp
Pronunciation: POL-ip
Abnormal tissue growth projecting from a mucous membrane surface, often detected during colonoscopy screening.
Full Definition
A polyp is an abnormal growth of tissue that projects from the surface of a mucous membrane, most commonly encountered in cancer screening during colonoscopic examination of the colon. Colorectal polyps can be classified as either neoplastic (adenomatous polyps that have malignant potential) or non-neoplastic (hyperplastic or inflammatory polyps with minimal cancer risk). Adenomatous polyps are considered precancerous lesions that can progress to colorectal cancer over time through the adenoma-carcinoma sequence. The detection and removal of polyps during screening colonoscopy is a key mechanism by which colorectal cancer incidence and mortality are reduced.
Usage
Usage note: In colonoscopy contexts, distinguish between adenomatous polyps (precancerous) and hyperplastic polyps (generally benign). Not all polyps are adenomas.
In Context
- "Three adenomatous polyps were identified and removed during screening colonoscopy using snare polypectomy." — Procedure report
- "The 15mm pedunculated polyp in the sigmoid colon showed high-grade dysplasia on pathological examination." — Pathology report