Exposure of the periesophageal space.
D004381:Duodenal Ulcer / Q000601:surgery; D004943:Esophagogastric Junction / Q000601:surgery; D004947:Esophagus / Q000601:surgery*; D005743:Gastrectomy; D005764:Gastroesophageal Reflux / Q000601:surgery; D006801:Humans; D013270:Stomach / Q000294:innervation / Q000601:surgery; D014628:Vagotomy