adenomatous polyp
A type of precancerous growth in the colon that has malignant potential and requires removal.
Full Definition
An adenomatous polyp is a type of colorectal polyp that arises from glandular epithelial tissue and is considered precancerous. These polyps are classified into three histologic subtypes: tubular, tubulovillous, and villous adenomas, with villous adenomas having the highest malignant potential. Adenomatous polyps are the primary target of colorectal cancer screening programs, as their removal can prevent progression to invasive carcinoma. The size, number, and histologic features of adenomatous polyps determine surveillance intervals after polypectomy.
Usage
Usage note: Distinguish from hyperplastic polyps, which are generally not considered precancerous. Size and histology determine clinical significance.
In Context
- "Pathology revealed a 1.5 cm tubular adenomatous polyp with low-grade dysplasia." — Colonoscopy report
- "Patients with multiple adenomatous polyps require shortened surveillance intervals." — Clinical guideline