PICTORIAL REVIEW   

Journal of Radiological Review 2021 December;8(4):292-301

DOI: 10.23736/S2723-9284.21.00149-2

Copyright © 2021 EDIZIONI MINERVA MEDICA

lingua: Inglese

Multimodality imaging of parotid gland oncocytoma: a pictorial review

Simone SACCO ^{1, 2}, Pascal LOMORO ³, Francesco BALLATI ¹, Dario BOCCUZZI ¹, Sara IMPARATO ⁴, Francesca RUJU ⁵, Olivia BOTTINELLI ¹, Barbara VISCHIONI ⁶, Mohssen ANSARIN ⁷, Lorenzo PREDA ^{1, 8} ✉

¹ Department of Clinical Surgical Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy; ² Division of Neuroimaging, Department of Medical Imaging, University of Toronto, Toronto, ON, Canada; ³ Department of Radiology, Valduce Hospital, Como, Italy; ⁴ Unit of Diagnostic Imaging, National Center of Oncological Hadrontherapy (CNAO), Pavia, Italy; ⁵ Department of Radiology, IRCCS European Institute of Oncology, Milan, Italy; ⁶ Unit of Radiotherapy, National Center of Oncological Hadrontherapy (CNAO), Pavia, Italy; ⁷ Department of Otolaryngology-Head and Neck Surgery, IRCCS European Institute of Oncology, Milan, Italy; ⁸ Department of Radiology, IRCCS San Matteo Polyclinic, Pavia, Italy

Parotid gland tumors include a wide range of entities, ranging from benign lesions such as pleomorphic adenoma and Warthin’s tumor, to aggressive malignant lesions such as carcinoma and lymphomas. Oncocytoma (OC) is a rare benign salivary gland tumor characterized by slow growth over years. It almost exclusively occurs within the parotid gland of elderly, accounting for about 1% of all salivary gland neoplasms. Distinguishing OC from other benign lesions and sometime from malignant lesions can be difficult. This pictorial review examines 8 cases of salivary gland lesions from our institute, including 5 histologically verified oncocytic lesions. We will discuss specifically the MRI and ultrasound appearance of OC regarding diagnostic clues as well as differential diagnoses.

KEY WORDS: Adenoma, oxyphilic; Parotid gland; Neoplasms; Ultrasonography; Magnetic resonance imaging; Diffusion magnetic resonance imaging