目的介绍并讨论一种治疗斜坡区肿瘤的经岩骨后乙状窦前的手术入路。
Objective To describe and discuss a transpetrosal-presigmoid approach for removal of tumors in clival regions.
结论枕下乙状窦后经内听道入路的听神经显微手术，能够取得较好的肿瘤全切除率和面听神经功能保留率。
Conclusion Undergoing retrosigmoid approach one can succeed to get hign rate of total acoustic neuroma removal, facial and hearing preservation.
目的：寻找乙状窦前入路中骨性半规管的轮廓化方法和内淋巴囊的识别标志。
Aim:To seek the landmark of bony semicircular canal and inner lymph sac.
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