title: Double pylorus: a hypothesis concerning its pathogenesis.
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005773:Gastroscopy; D006801:Humans; D008297:Male; D011708:Pylorus / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography; D013270:Stomach / Q000000981:diagnostic imaging; D013272:Stomach Diseases / Q000175:diagnosis / Q000209:etiology; D013276:Stomach Ulcer / Q000150:complications* / Q000000981:diagnostic imaging