目的 :探讨激光显微技术治疗较大听神经瘤的方法。方法 :采用枕下乙状窦后入路 ,在Ｏｐｔｏｎ手术显微镜和Ｚｅｉｓｓ手术显微镜下 ,应用半导体激光和ＹＧＣＯ2 6型激光手术器治疗较大听神经瘤 1 0例。常规暴露肿瘤后 ,首先分离肿瘤与脑组织的蛛网膜界面 ,剥离肿瘤表面蛛网膜 Objective: To investigate the method of laser microscopy for the treatment of large acoustic neuroma. Methods: Suboccipital sigmoid sinus posterior approach was used. One hundred patients with larger acoustic neuroma were treated with semiconductor laser and YGCO2 6 laser under Opton operating microscope and Zeiss operating microscope. After routine exposure to the tumor, the arachnoid interface of the tumor and brain tissue is first separated and the arachnoid