Chondroid lipoma of the parotid gland |
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| Affiliation: | 1. Philip Leverhulme Equine Hospital, School of Veterinary Science, University of Liverpool, Leahurst, Neston, Wirral CH64 7TE, UK;2. Three Counties Equine Hospital, Ripple, Tewkesbury GL20 6HE, UK;3. Veterinary Pathology, Faculty of Veterinary Medicine, University of Helsinki, Agnes Sjöbergin katu 2, 00014 Helsinki, Finland;4. Veterinary Epidemiology and Public Health, School of Veterinary Science, University of Liverpool, Leahurst, Neston, Wirral CH64 7TE, UK;5. Veterinary Pathology, School of Veterinary Science, University of Liverpool, Liverpool Science Park IC2, 146 Brownlow Hill, Liverpool L3 5RF, UK;6. Department of Infection Biology, University of Liverpool, Liverpool Science Park IC2, 146 Brownlow Hill, Liverpool L3 5RF, UK |
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| Abstract: | The presence of a parotid tumour containing cartilage immediately invokes a diagnosis of pleomorphic adenoma. However, the case we wish to highlight is a rare primary parotid neoplasm composed of both immature and mature fat and cartilaginous-looking areas conforming histologically to a chondroid lipoma.This lesion is a well-circumscribed, lobulated tumour composed of mature fat, mono- and multi-vacuolated lipoblastic-like cells suspended in a chondromyxoid matrix, simulating a cartilaginous tumour. There is no cytological atypical thus separating it from malignant fat and cartilaginous tumours. Chondroid lipomas do not show epithelial differentiation and exhibit only focal cytokeratin immunoexpression, thereby allowing for separation from pleomorphic adenoma and myoepithelioma. |
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| Keywords: | chondroid lipoma lipoma parotid pleomorphic adenoma |
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