Fig. 1From: Filiform polyposis with sigmoid colon adenocarcinoma: a case reportColonoscopic study of the tumor. Colonoscopy revealed a large tumor with numerous white-pale reddish polyps of worm-like shape in the sigmoid colon. Biopsies showed well-differentiated to moderately differentiated tubular adenocarcinoma. The colonoscope could not be inserted beyond this pointBack to article page