CASE REPORT   

Otorinolaringologia 2020 December;70(4):152-5

DOI: 10.23736/S0392-6621.20.02285-7

Copyright © 2020 EDIZIONI MINERVA MEDICA

lingua: Inglese

Oncocyitic lipoadenoma of the parotid gland

Renato PIANTANIDA ¹, Alberto CARANTI ² ✉, Adele CHIESA ¹, Jessica BARIZZI ³, Ulrike PERRIARD ³, Filippo BARUCCA ¹, Antonio PELLANDA ¹

¹ Department of Otorhinolaryngology, Head and Neck Surgery, Ente Ospedaliero Cantonale, Lugano, Switzerland; ² Department of Visceral Surgery, Ente Ospedaliero Cantonale, Lugano, Switzerland; ³ Institute of Clinical Pathology, Locarno, Switzerland

Oncocytic lipoadenoma is an extremely rare benign tumor of the salivary glands; less than 20 cases have been reported in literature, since the first report in 1998. We are presenting a case of a 73-year-old man with a slowly growing painless parotid mass; ultrasound and magnetic resonance imaging enhanced with gadolinium showed a lesion with benign features and heterogeneous content. Fine needle aspiration biopsy was suggestive for a Warthin’s tumor. Surgical approach was a classic lateral parotidectomy with facial nerve identification and preservation. Histology revealed a well-capsulated mass with mixed components, including oncocytes (70%) and mature adipocytes (30%), consistent with oncocytic lipoadenoma. The results of immunohistochemical staining supported this diagnosis. Main characteristics of this neoplasm are reviewed and briefly discussed, along with the differential diagnostic elements of more common lesions. The knowledge and the awareness of this entity could be helpful when evaluating a patient with a salivary gland tumor.

KEY WORDS: Salivary gland neoplasms; Head and neck neoplasms; Parotid gland