Perimolysis: unveiling the surreptitious vomiter.

Perimolysis is a dental condition linked to chronic regurgitation. When perimolysis is found in the patient who denies vomiting, one must suspect anorexia nervosa, a disorder with a high rate of morbidity and mortality. The dental literature has not provided guidelines for confirming the suspicion of surreptitious vomiting. The purpose of this case report is to describe our approach, using simple blood and urine studies, which establishes whether a patient who has perimolysis but denies vomiting is a surreptitious vomiter.