title: Oncocytic lipoadenoma of the parotid gland: a report of a new case and review of the literature.
abstract: Oncocytic lipoadenoma is a rare salivary gland tumour composed of adipose tissue and oncocytic epithelial 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 composed of oncocytoma-like epithelial component admixed 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.
authors.affiliation: Department of Oral and Maxillofacial Surgery, University Hospital, 91054 Erlangen, Germany. Konstantions.Mitsimponas@uk-erlangen.de
authors.forename: Konstantinos T
authors.initials: KT
authors.lastname: Mitsimponas
authors.forename: Abbas
authors.initials: A
authors.lastname: Agaimy
authors.forename: Tilo
authors.initials: T
authors.lastname: Schlittenbauer
authors.forename: Emeka
authors.initials: E
authors.lastname: Nkenke
authors.forename: Friedrich-Wilhelm
authors.initials: FW
authors.lastname: Neukam
mesh_terms: D000236:Adenoma / Q000473:pathology* / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001706:Biopsy; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008067:Lipoma / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D024862:Oxyphil Cells / Q000473:pathology*; D010307:Parotid Neoplasms / Q000473:pathology* / Q000601:surgery; D011237:Predictive Value of Tests; D016896:Treatment Outcome; D047368:Tumor Burden; D055815:Young Adult
keywords: Salivary gland tumours; lipoadenoma; oncocytes; sialolipoma