Two Cases of Peripheral Facial Nerve Neurilemmoma

Lim, Jong Beom; Kim, Jin Pyeong; Ahn, Seong Ki; Jeon, Sea Yuong

Abstract

Neurilemmomas are benign tumors that arise from the nerve sheath. Facial nerve neurilemmomas are uncommon, slow-growing neoplasms that occur anywhere along the course of the facial nerve. The majority of facial nerve neurilemmomas are intratemporal, with a few cases arising from the intraparotid portion. The clinical presentations are generally insidious and the nature of the disease depends on the location and extent of the tumor. They are difficult to diagnose preoperatively and are frequently misdiagnosed because of the variety of their clinical manifestations. Therefore, early and correct diagnosis and evaluation are necessary. Recently, we experienced two cases of facial nerve neurilemmoma with relatively good surgical result, involving the mastoid segment of the facial nerve and the main trunk of the facial nerve in the parotid gland. We reviewed the diagnosis, pathology, and treatement of this case, and report the cases with reviews of literature.