All of the following are significant risk factors for colonic carcinoma in an adenomatous polyp except: (A) Pedunculated polyp, (B) Villous histology, (C) Size > 2 cm, (D) Atypia
Answer is A. 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.