Fig. 2

Colonoscopic and pathological findings of colorectal polyps. A, B Colonoscopy showing a sessile polyp with a central depression in the rectosigmoid area and multiple polyps. C Gross image of the resected rectosigmoid colon. A total of 13 polyps, with maximum diameters of up to 45 mm, are found. D Microscopic view of the largest polyp (white arrowhead in B). Intramucosal adenocarcinoma (pT1) with complex cribriform architecture in adenoma. E, F Microscopic view of other polyps (black and white arrows in C). Low-grade tubular adenoma