A Case of Oncocytoma of the Parotid Gland

Abstract

Oncocytoma mainly occurs in the salivary glands, most commonly in the parotid glands. Oncocytoma is less than 1% of the total salivary gland tumor. Oncocytomas are characterized by the proliferation of oncocytes containing eosinophil granules. Oncocytomas commonly occur in women and have been reported in both the left and right parotid glands. Neck ultrasound, contrast computed tomography, and contrast magnetic resonance imaging are useful for diagnosis. However, preoperative diagnosis is difficult, and most oncocytomas are diagnosed pathologically using the resected specimen. The possibility of malignant transformation has been suggested, and surgical removal is common. Here, we report a case of an oncocytoma that occurred in a parotid gland.