title: Double pylorus--an unusual complication of peptic ulcer disease.
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D010437:Peptic Ulcer / Q000150:complications*; D011708:Pylorus; D013272:Stomach Diseases / Q000209:etiology; D013276:Stomach Ulcer / Q000601:surgery