Oncocytic lipoadenoma of the parotid gland: a report of a new case and review of the literature

Konstantinos Mitsimponas, Abbas Agaimy, Tilo Schlittenbauer, Emeka Nkenke, Friedrich-Wilhelm Neukam
2012 Int J Clin Exp Pathol   unpublished
Oncocytic lipoadenoma is a rare salivary gland tumour composed of adipose tissue and oncocytic epithe-lial cells in varied proportions. This tumour is still not included in the current WHO classification of salivary gland neoplasms. We herein report a further case of oncocytic lipoadenoma originating in the parotid gland of a 55-year-old woman. The tumour presented as a slowly growing asymptomatic left-sided parotid gland mass. The resected tumour measured 2.7 cm in maximum diameter and was
more » ... osed of oncocytoma-like epithelial component ad-mixed with mature adipocytes that made up 10% of the whole mass. Foci of sebaceous differentiation were seen. This rare variant of lipomatous salivary gland tumours is in need of more recognition and should be distinguished from other fat-containing salivary gland lesions, particularly lipomatous pleomorphic adenoma and myoepithelioma.