Oncocytoma of the parotid gland with malignant change.

We report on a patient with preinvasive malignant change in an oncocytoma of the right parotid gland. Histologic transition from benign morphology to malignant cellular atypia, to our knowledge described only once previously in the literature, was present. Satisfactory results from wide surgical resection and postoperative radiotherapy in our patient serve as additional experience in the treatment of this rare malignancy.