The value of colonoscopy, biopsy and colonoscopic polypectomy.
D001706:Biopsy; D003110:Colonic Neoplasms / Q000175:diagnosis / Q000601:surgery; D004724:Endoscopy; D006801:Humans; D007417:Intestinal Polyps / Q000175:diagnosis / Q000601:surgery; D008297:Male; D008875:Middle Aged; D012812:Sigmoidoscopy