Oncocytoma of the Parotid Gland with Facial Nerve Paralysis.

Seijiro Hamada,Keishi Fujiwara,Akihiro Homma,Hiromitsu Hatakeyama

doi:10.1155/2018/7687951

Seijiro Hamada, Keishi Fujiwara + Show 2 more

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https://doi.org/10.1155/2018/7687951

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Abstract

Parotid gland tumor with facial nerve paralysis is strongly suggestive of a malignant tumor. However, several case reports have documented benign tumors of the parotid gland with facial nerve paralysis. Here, we report a case of oncocytoma of the parotid gland with facial nerve paralysis. A 61-year-old male presented with pain in his right parotid gland. Physical examination demonstrated the presence of a right parotid gland tumor and ipsilateral facial nerve paralysis of House–Brackmann (HB) grade III. Due to the facial nerve paralysis, a malignant tumor of the parotid gland was suspected and right parotidectomy was performed. Oncocytoma was confirmed histopathologically. The facial nerve paralysis was resolved 2 months after surgery. During the follow-up period (one and a half years), no recurrence was observed. As the tumor showed a distinctive dumbbell shape and increased somewhat due to inflammation (i.e., infection), the facial nerve was pinched by the enlarged tumor. Ischemia and strangulation of the nerve were considered to be the cause of the facial nerve paralysis associated with the benign tumor in this case.

Highlights

Parotid tumor with facial nerve paralysis is generally considered as a criterion for malignancy
We describe the case of a 61-year-old male who suffered from right parotid oncocytoma with facial nerve paralysis
Physical examination revealed a painful mass in his right parotid gland of approximately 30 mm in diameter and ipsilateral facial nerve palsy of House– Brackmann (HB) grade III

Summary

Introduction

Parotid tumor with facial nerve paralysis is generally considered as a criterion for malignancy. Several case reports have documented benign tumors of the parotid gland with facial nerve paralysis, with almost all of these cases diagnosed as Warthin’s tumor [1,2,3,4,5] or pleomorphic adenoma [6, 7]. Oncocytomas are rare benign tumors that comprise about 0.1 to 1.5% of all salivary gland tumors [8]. We describe the case of a 61-year-old male who suffered from right parotid oncocytoma with facial nerve paralysis

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