Oncocytic adenocarcinoma of salivary glands.

Oncocytic adenocarcinoma of salivary gland origin is an extremely rare neoplasm. The diagnosis is established on the basis of oncocytic cellular features in conjunction with dysplastic change. These dysplastic changes may occur in benign oncocytomas or arise de novo. The tumor occurs most commonly in the parotid glands of persons over 60 years of age. Tumors that measure less than 2 cm at the initial surgical procedure appear to have a better prognosis than larger tumors. Aggressive surgical intervention at the initial presentation of the neoplasm, compared to simple enucleation, seems to offer a more favorable prognosis. Recurrence is an ominous feature. Metastasis, when it occurs, is widespread.