Abstract
We report a surgical case of intraparotid facial nerve schwannoma, which was preoperatively diagnosed as pleomorphic adenoma. A 40-year-old woman was diagnosed with pleomorphic adenoma of the parotid gland by MRI and fine needle aspiration cytology. Surgical excision of the parotid tumor was planned. However, during surgery the tumor was found to originate from the main trunk of the facial nerve. We diagnosed the tumor as facial nerve schwannoma in the parotid gland and performed intracapsular excision of the tumor using electrical intraoperative monitoring of the facial nerve to preserve facial nerve function. We succeeded in a subtotal tumor excision with mild postoperative facial nerve paralysis, which was recovered completely within three months.
