title: Intermittent unexplained rectal bleeding in childhood.
mesh_terms: D000293:Adolescent; D001466:Barium Sulfate; D002648:Child; D002675:Child, Preschool; D003113:Colonoscopy; D004733:Enema; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis*; D006801:Humans; D012007:Rectum; D012812:Sigmoidoscopy
chemical_list: D001466:Barium Sulfate