Oncocytoma of the parotid gland.

Oncocytoma of the parotid gland. Parotid oncocytomas account for 1% of all salivary gland tumors. (1) These tumors are classified as one of three types: diffuse oncocytosis, focal adenomatous oncocvtic hyperplasia, and oncocytoma. (2) A62-year-old woman... More

Oncocytoma of the parotid gland. Parotid oncocytomas account for 1% of all salivary gland tumors. (1) These tumors are classified as one of three types: diffuse oncocytosis, focal adenomatous oncocvtic hyperplasia, and oncocytoma. (2) A62-year-old woman presented with a clinical history of a slowly growing, painless mass in the right parotid gland area. She experienced intermittent pain and facial nerve dysfunction. Computed tomography (CT) demonstrated a relatively well-marginated mass arising from the right parotid gland (figure). During surgical excision, the mass was identified as a well-circumscribed parotid oncocytoma. Histologically, the lesion contained multiple brown and tan nodules, some of which exhibited central scarring. (3) [FIGURE OMITTED] In a series of 68 patients with oncocytic salivary gland tumors, 84% of tumors occurred in the parotid gland, 11% occurred in the soft mandibular gland, and 5% represented incidental findings in the cervical lymph nodes) Most patients Less