Meckel's diverticulum.
D006801:Humans; D007082:Ileum; D007415:Intestinal Obstruction / Q000209:etiology*; D008467:Meckel Diverticulum / Q000150:complications*; D009369:Neoplasms; D010437:Peptic Ulcer / Q000209:etiology*
ILEUM/neoplasms; INTESTINAL OBSTRUCTION/etiology; MECKEL'S DIVERTICULUM/complications; PEPTIC ULCER/etiology