The esophagogastric junction.
D004931:Esophageal Achalasia / Q000601:surgery; D004940:Esophageal Stenosis / Q000601:surgery; D004942:Esophagitis, Peptic / Q000601:surgery; D004943:Esophagogastric Junction; D005764:Gastroesophageal Reflux / Q000601:surgery; D006396:Hematemesis / Q000601:surgery; D006548:Hernia, Diaphragmatic / Q000601:surgery; D006801:Humans; D008309:Mallory-Weiss Syndrome / Q000601:surgery