Parotid gland oncocytosis: Multifocal adenomatous oncocytic hyperplasia variant - A case report in Singapore.

Oncocytosis is a rare, benign, non-neoplastic lesion that can be further classified into diffuse oncocytosis or multifocal adenomatous oncocytic hyperplasia. This tumour has been estimated to account for 0.1% of all parotid gland tumours.1 Here, we report a rare case of a patient who presented to the Oral and Maxillofacial Surgery Department with a 3-cm swelling of his left parotid gland. Histopathological results from a superficial parotidectomy revealed the lesion to be a multifocal adenomatous oncocytic hyperplasia of the parotid gland. A description of this rare disease and its management are included in this article.