title: Investigation of rectal bleeding.
mesh_terms: D000328:Adult; D001466:Barium Sulfate; D003110:Colonic Neoplasms / Q000150:complications* / Q000175:diagnosis; D003113:Colonoscopy; D004733:Enema; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D012002:Rectal Diseases / Q000209:etiology*
chemical_list: D001466:Barium Sulfate