[Carcinoma of the proximal esophagus, a complication of long-standing achalasia].
D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000209:etiology*; D004931:Esophageal Achalasia / Q000150:complications*; D004938:Esophageal Neoplasms / Q000175:diagnosis / Q000209:etiology*; D004945:Esophagoscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors