Smooth-muscle tumors of the oral cavity.

Smooth muscle tumors of the oral cavity are rare. The world literature revealed 80 leiomyomas and 21 leiomyosarcomas. We presented one new case of each lesion in this report and discussed diagnostic and treatment considerations and prognosis. Treatment recommendations for leiomyoma and leiomyosarcoma require an en bloc excision with at least 1-cm margins of normal tissue. Both lesions may look alike clinically and may not even be definitively differentiated histologically; therefore, a follow-up period of 5 years is suggested.