[Difficulty in determining the position of the cardia after Nissen's intervention].
D002299:Cardia / Q000002:abnormalities / Q000000981:diagnostic imaging*; D004947:Esophagus / Q000000981:diagnostic imaging*; D005764:Gastroesophageal Reflux / Q000209:etiology; D006548:Hernia, Diaphragmatic / Q000601:surgery*; D006801:Humans; D007223:Infant; D008297:Male; D008722:Methods; D011183:Postoperative Complications; D011859:Radiography