Endoscopic diagnosis and treatment of achalasia: endoscopic observations.
D000293:Adolescent; D000328:Adult; D000368:Aged; D004106:Dilatation; D004931:Esophageal Achalasia / Q000175:diagnosis* / Q000628:therapy; D004945:Esophagoscopy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged