title: Intraoral adult rhabdomyoma: a case report.
abstract: A case of adult rhabdomyoma is reported. The lesion is a rare benign tumor of skeletal muscle origin which occurs predominantly in the head and neck region. In the present case, the clinical diagnosis favored a benign salivary gland tumor. Histologically, the tumor was composed of large round, oval, and polygonal cells of varying size with abundant pale, eosinophilic, fine, granular cytoplasm with peripherally located nuclei. Immunohistochemically, the lesion was positive for muscle-specific actin, smooth muscle actin, desmin, S100 protein, and Masson's trichrome. Electron microscopic examination confirmed the presence of numerous myofibrils. The lesion was treated by surgical resection. The clinical, histological, immunohistochemical, and ultrastructural features are discussed in this study.
authors.affiliation: Department of Oral Pathology, São Leopoldo Mandic Institute and Research Center, Rua José Rocha Junqueira 13 Ponte Preta, 13045-755 Campinas, SP, Brazil.
authors.forename: Ana
authors.initials: A
authors.lastname: Amelia Souza
authors.forename: Vera Cavalcanti
authors.initials: VC
authors.lastname: de Araújo
authors.forename: Fabricio
authors.initials: F
authors.lastname: Passador Santos
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Ferreira Martinez
authors.forename: Jose Ferreira
authors.initials: JF
authors.lastname: de Menezes Filho
authors.forename: Ney
authors.initials: N
authors.lastname: Soares de Araujo
authors.forename: Andresa Borges
authors.initials: AB
authors.lastname: Soares