Leiomyosarcoma of the Maxillary Alveolus ; Report of a case

Abstract

A case of leiomyosarcoma of the maxillary alveolus in a 45-year old Japanese woman, including ultrastructural and immunohistochemical findings, is reported. The patient was clinically free of tumor 56 months later. By electron microscopic study, the tumor cells contained microfilaments with focal densities and pinocytotic vesicles on the basement membrane. Immunohistologically, the cytoplasm of tumor cells strongly immunoreacted with desmin, vimentin and α-smooth muscle actin, but not with myosin, neurofilament or S-100 protein.