Surveillance for colonic polyps.
D000236:Adenoma / Q000601:surgery; D000328:Adult; D003111:Colonic Polyps / Q000175:diagnosis* / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D006965:Hyperplasia; D008875:Middle Aged; D009780:Occult Blood; D012812:Sigmoidoscopy