Three Cases of Intraparotid Facial Nerve Schwannoma

概要

論文の詳細を見る
The intraparotid facial nerve schwannoma is a rare entity, accounting for less than 5% of all parotid tumors. Because it does not show specific clinical characteristic or imaging findings, preoperative diagnosis is very difficult. We report herein on 3 cases of intraparotid facial nerve schwannoma. The patients were a 47-year-old woman (case 1), a 31-year-old man (case 2), and a 34-year-old man (case 3). Their chief complaint was a pre- or subauricular painless mass in all cases. None of them showed preoperative facial nerve palsy. A schwannoma had not been suspected until the postoperative histopathological examination in case 1, intraoperative nerve stimulation in case 2, and intraoperative frozen-section analysis in case 3. In cases 1 and 2, the tumor was totally removed with preservation of the facial nerve. On the other hand, in case 3, the tumor had merged with the main trunk of the facial nerve, and therefore, intracapsular removal was performed. The postoperative clinical course was uneventful in case 1. Facial nerve palsy occurred in the other two cases after surgery; mild and temporary in case 2, and noticeable and persistent in case 3. Because of the rarity of intraparotid facial nerve schwannomas and the difficulty of preoperative diagnosis, this tumor is usually discovered unexpectedly following occurrence. Once the tumor has been confirmed as a facial nerve schwannoma, complete tumorectomy often conflicts with functional preservation. We should be aware of the possibility of this rare entity in the management of parotid gland tumors.

Three Cases of Intraparotid Facial Nerve Schwannoma

スポンサーリンク

概要

著者

関連論文

スポンサーリンク