Synchronous oncocytoma and Warthin's tumor in the ipsilateral parotid gland:a case report and review of the literature

Purpose To explore the clinicopathologic features and histogenesis of oncocytoma associated with Warthin's tumor of the ipsilateral parotid gland.Methods A case of synchronous oncocytoma and Warthin's tumor in the ipsilateral parotid gland was observed by using HE and immunohistochemistry with review of the related literatures.Results The patient was a 72-year-old man who presented with a mass in the right parotid with pain for 10 days.The resected mass was solid and reddish in gross appearance.Microscopic examination revealed that the tumor was mainly composed of oncocytoma,but some areas showed the morphological patterns of Warthin's tumor,and these two tumor cells had the same immunophenotype.Conclusion The presence of synchronous salivary gland tumors with different histopathology in the ipsilateral parotid gland is extremely rare,and both tumor components may have a same origin.The prognosis is closely related with the primary tumor.