[Clinical reflexions on a case of primary achalasia of the esophagus diagnosed late].

We describe an unusual case of achalasia. The patient, a 33-year-old woman, presented with a clinical history of esophageal disease verified by gastroscopy. The diagnosis of hysterical anorexia that had been made some years previously did not correspond with the nosological classifications (DSM III-R, DSM IV). This case underscores the importance of the correct use of clinical methodology, particularly when conclusive diagnosis is essential for successful treatment.