Adenosquamous carcinoma ex pleomorphic adenoma of the hard palate

초록

Carcinoma ex pleomorphic adenoma of salivary gland is an uncommon neoplasm, constituting approximately 3.6% of all salivary gland tumors and 2-5% of all pleomorphic adenomas. The carcinoma which develops in a pleomorphic adenoma is most frequently an adenocarcinoma and second most common is undifferentiated carcinoma. Less frequently the malignancy will be squamous cell carcinoma, mucoepidermoid carcinoma, adenoid cystic carcinoma, polymorphous low grade carcinoma, and myodepthelioma. However, adenosquamous carcinoma arising from pleomorphic adenoma has not been reported yet. We report a casse of adenosquamous carcinoma developed in a pleomorphic adenoma.