Primary Leiomyosarcoma of the Mandible in a Child.

Leiomyosarcoma is an aggressive soft-tissue malignancy derived from smooth muscle cells that rarely affects the oral cavity. We discuss the case of an 11-year-old boy with leiomyosarcoma that presented initially as a gingival swelling over his unerupted mandibular right permanent second molar. We highlight how appropriate imaging, prompt follow-up, and biopsy led to early diagnosis and ultimately a favorable clinical outcome.