Gastrointestinal tract duplication; massive hemorrhage from ulcer.
D000013:Congenital Abnormalities; D006801:Humans; D007421:Intestine, Small / Q000002:abnormalities*; D007422:Intestines; D008551:Melena / Q000209:etiology*; D010437:Peptic Ulcer; D010438:Peptic Ulcer Hemorrhage; D014456:Ulcer
ABNORMALITIES; INTESTINE, SMALL/abnormalities; MELENA/etiology and pathogenesis; PEPTIC ULCER/hemorrhage