Abstract
Myoepithelioma is a rare tumor accounting for less than 1.5% of all salivary gland tumors. Clinically, myeopithelioma present as slow-growing, painless masses and cannot be distinguished from pleomorphic adenoma. We report a case of myoepithelioma of the palate. The patient was a 51-year-old woman who had a painless mass on the palate. On magnetic resonance image, the mass showed slightiy high signal intensity on T1-weighted images enhanced by gadolinium-DTPA and high signal intensity on T2-weighted images. The tumor was surgically removed under general anesthesia. The tumor was well encapsulated by a fibrous membrane. Histologically, the tumor was composed of mainly plasmacytoid cells with eccentric nuclei. Immunohistochemical studies revealed positive reaction for S-100 protein and cytokeratin in the tumor cells. Postoperative observation revealed no recurrence, as of 1year and 9month after the operation.
