system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
All of the following are significant risk factors for colonic carcinoma in an adenomatous polyp except
assistant
The correct answer is  Adenomatous polyps may be sessile or pedunculated. Cancers develop more frequently in sessile polyps.
Atypia, on histology, seen anywhere, is a risk factor for cancer.