[Megaesophagus and Heller's operation].
D004194:Disease; D004931:Esophageal Achalasia / Q000601:surgery*; D004935:Esophageal Diseases; D004947:Esophagus; D006801:Humans
CARDIOSPASM/surgery; ESOPHAGUS/diseases
Il megaesofago e l'operazione di Heller.