title: [X-ray classification and clinical course of esophageal hiatus hernia].
mesh_terms: D004945:Esophagoscopy; D004947:Esophagus / Q000000981:diagnostic imaging; D006548:Hernia, Diaphragmatic / Q000145:classification*; D006551:Hernia, Hiatal / Q000145:classification* / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography