Colorectal polypoid lesions.
D000231:Adenocarcinoma, Papillary / Q000175:diagnosis*; D000328:Adult; D000337:Aerospace Medicine; D003110:Colonic Neoplasms / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011127:Polyps / Q000175:diagnosis*; D012004:Rectal Neoplasms / Q000175:diagnosis*; D012812:Sigmoidoscopy