[Leiomyoma of the masseter muscle. Report of a case].

The authors present a clinical case of leiomyoma, localized in the anterior margin of the masticator muscle. The clinical diagnosis was formulated following the histological test on the operating part. It is a case a rare pathology of the oral cavity that isn't commonly suspected. The symptoms of the patient let think a pathology of ATM and it was not typical of benign or malign neoplasm of the soft tissue of oral cavity. Only the use of a special clinical test, permitted the possibility to diagnose the exceptional case of masseter muscle on the left. The surgical therapy, being the neoplasm case benign and well capsuled resulted to be treatable and permitted the definitive resolution of the case.