RESUMO
Benign myoepithelioma is a very rare form of salivary gland tumor, composed entirely of myoepithelial cells. It accounts for approximately 1% of all salivary gland tumors and is most frequently located in the parotid gland and in the minor salivary glands of the hard palate. We describe herein the ninth reported case of myoepithelioma of the submandibular gland. Benign myoepithelioma must be differentiated from several benign and malignant epithelial and mesenchymal tumors. Immunohistochemical staining can help differentiate between these conditions, but histopathology remains the gold standard for diagnosing this neoplastic process.
Assuntos
Mioepitelioma/patologia , Neoplasias da Glândula Submandibular/patologia , Diagnóstico Diferencial , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
The Authors report a case of Merkel cell carcinoma of the cervicofacial district, particular due to its clinical and evolutive characteristics. The Merkel cell carcinoma was first identified by Toker in 1972 and is also known as a primary neuroendocrine the or trabecular carcinoma of the skin. The Merkel cell carcinoma is a rare aggressive skin cancer most frequently localized in the cervicofacial district. Although in earlier reports on the clinical history of these tumors primary emphasis was placed on their local aggressive behaviour, it has recently become evident that these neoplasms have a marked propensity for early dissemination. Distant metastases are often responsible for disease-related mortality. Merkel cell carcinoma have classically been managed with surgery alone or surgery followed by radiation therapy. Treatment of Merkel cell carcinoma with radiation therapy alone has usually been reserved for advanced unresectable tumors.
