Oral leiomyosarcomas: report of two cases with immunohistochemical profile - Rodini, Camila Oliveira; Pontes, Flavia Sirotheau Correa; Pontes, Helder Antonio Rebelo; Santos, Paulo Sergio da Silva; Magalhães, Marina Helena Gallottini; Pinto Junior, Decio Santos (Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 2007)