Ulceration of the small bowel.
D003424:Crohn Disease / Q000150:complications; D006801:Humans; D007410:Intestinal Diseases / Q000209:etiology*; D007413:Intestinal Mucosa / Q000166:cytology; D007414:Intestinal Neoplasms / Q000150:complications; D007421:Intestine, Small / Q000098:blood supply; D010437:Peptic Ulcer / Q000209:etiology; D014376:Tuberculosis / Q000150:complications; D014456:Ulcer / Q000209:etiology