Abstract
Carcinoma ex pleomorphic adenoma (Ca ex PA) is a malignant epithelial salivary gland neoplasm that arises from or within a pleomorphic adenoma. It has been named Carcinoma ex mixed tumor, Carcinoma ex adenoma, and Carcinoma ex benign pleomorphic adenoma. Ca ex PA is rare and accounts for approximately. 3-6% of all salivary gland neoplasms and 11% of all malignant salivary gland tumors. Ca ex PA of the maxillary sinus is rare and has occasionally been reported as part of a large series. The present article reports two cases of maxillary sinus Ca ex PA.