Proctosigmoidoscopy and polypectomy in reducing the incidence of rectal cancer.
D000230:Adenocarcinoma / Q000175:diagnosis / Q000517:prevention & control*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007417:Intestinal Polyps / Q000628:therapy; D008297:Male; D008875:Middle Aged; D011351:Proctoscopy; D012004:Rectal Neoplasms / Q000175:diagnosis / Q000517:prevention & control*; D012812:Sigmoidoscopy