Obstructing peptic ulcers.
D005743:Gastrectomy; D005763:Gastroenterostomy; D006801:Humans; D010437:Peptic Ulcer / Q000150:complications* / Q000601:surgery; D011183:Postoperative Complications; D011707:Pyloric Stenosis / Q000601:surgery; D014628:Vagotomy