Surgical significance of the lower esophageal ring.
D003680:Deglutition Disorders / Q000175:diagnosis* / Q000209:etiology*; D004940:Esophageal Stenosis / Q000209:etiology / Q000601:surgery*; D004947:Esophagus / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D006548:Hernia, Diaphragmatic / Q000601:surgery; D006801:Humans; D011859:Radiography