A case of leiomyoma of the lower lip

Abstract

A 48-year-old woman complained of a swelling in the lower lip. It measured 10 × 15mm and had a sharp border and elastic hardness. A white-yellow solid tumor was removed under local anesthesia.
Histopathological examination revealed compact gathering of spindle-shaped smooth muscles cells, partially covered with a fibrous capsule. The cells were stained yellow with elastica-van Gieson stain and red with Mallory-Azan stain.
The lesion was diagnosed to be a nonvascular leiomyoma. A discussion on the differential diagnosis of nonvascular and vascular leiomyomas is also provided.