Intraosseous leiomyoma of the mandible

An intraosseous leiomyoma arising within the mandible was diagnosed in a 24 -year-old woman. Clinically, a nodular swelling of the lower border of the mandible was noted. Radiographically, a unilocular ellipsoid radiolucency, loss of the lower border of the mandible, and tooth resorption were observe d. The mitotic count was 0.4 per 10 high-power fields, which supported the benign nature of the tumor The clinical and histologic parameters for disti nguishing between benign and malignant smooth muscle neoplasms are discusse d.