听神经瘤 (acousticneuroma ,AN)为原发于第Ⅷ颅神经鞘膜上的肿瘤 ,为神经膜瘤 ,属良性肿瘤。它主要来自于位听神经的前庭神经分支 ,故又有“前庭神经鞘瘤 (vestibularschwannoma ,VS)”之称。早期 ,肿瘤位于内听道底 ,逐渐长大后 ,侵蚀内听道各壁 ,致使内听道口扩大并向小脑桥 Acoustic neuroma (acousticneuroma, AN) is the primary tumor in the Ⅷ cranial nerve sheath, is a meningioma, which is a benign tumor. It is mainly from the vestibular nerve branch of the auditory nerve, so it has “vestibular schwannoma (vestibularschwannoma, VS),” said. Early, the tumor is located at the end of the auditory canal, gradually grow up, erosion of the auditory canal wall, resulting in the enlarged intraocular and oral to the cerebellopontine bridge