Rectal bleeding.
D000328:Adult; D001466:Barium Sulfate; D003110:Colonic Neoplasms / Q000150:complications / Q000175:diagnosis; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis / Q000209:etiology; D006801:Humans; D012002:Rectal Diseases / Q000175:diagnosis / Q000209:etiology; D012004:Rectal Neoplasms / Q000150:complications / Q000175:diagnosis; D012812:Sigmoidoscopy
D001466:Barium Sulfate