Bilateral epithelial-myoepithelial carcinoma of the parotid glands.

Abstract

The most common histological diagnosis of bilateral parotid gland neoplasm is Warthin tumor. Bilateral malignant tumors of the parotid gland are extremely rare. A 60-year-old man presented with a painless mass in the right preauricular area and an MRI scan showed multiple masses in the parotid glands, bilaterally. A standard superficial parotidectomy was performed on the right parotid gland followed by subtotal parotidectomy on the left. The diagnosis was synchronous bilateral epithelial-myoepithelial carcinoma arising in the parotid glands. Histopathology of the tumor on both sides indicated epithelial-myoepithelial carcinoma. There was no evidence of locoregional or remote disease during a 5-year follow-up period. Malignant tumors should be included in the differential diagnosis of bilateral parotid gland tumors. Management of unilateral malignant parotid tumors should involve careful observation of the contralateral parotid gland.