[Carcinoma of the esophagus associated with achalasia of cardia: report of 6 cases].
D000328:Adult; D004931:Esophageal Achalasia / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D004938:Esophageal Neoplasms / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged