Routine sigmoidoscopy.
D000293:Adolescent; D000328:Adult; D000368:Aged; D003110:Colonic Neoplasms / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007410:Intestinal Diseases / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D012812:Sigmoidoscopy