Achalasia of the esophagus.
D000328:Adult; D000368:Aged; D004106:Dilatation; D004931:Esophageal Achalasia / Q000601:surgery / Q000628:therapy*; D004943:Esophagogastric Junction / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009130:Muscle, Smooth / Q000601:surgery