临床资料 自1984年8月至1987年11月,对三又神经痛病人施行乙状窦后径路三叉神经根减压术180例,发现三叉神经根部有胆脂瘤压迫和包绕者21例,占11.7％。其中男9例,女12例。年龄平均为39.8岁。病程3～15年。均为单侧发病,左侧13例,右侧8例。其中1例CT发现右侧有大的胆脂瘤,由脑干腹侧侵犯到左侧桥小脑角,脑干有偏移,病人左侧三叉神经痛6年余。上下颌支同时受累12例,眼 Clinical data From August 1984 to November 1987, 180 patients with trigeminal neuralgia underwent retrosigmoidal posterior approach trigeminal nerve root decompression and found that the trigeminal nerve root cholesteatoma compression and wrapping in 21 cases, Accounting for 11.7%. There were 9 males and 12 females. The average age is 39.8 years old. Duration of 3 to 15 years. All were unilateral disease, left in 13 cases, right in 8 cases. One case of CT found on the right side of a large cholesteatoma, inflamed from the ventral brainstem to the left side of the cerebellopontine angle, a deviation of the brainstem, the patient left trigeminal neuralgia more than 6 years. Upper and lower jaw involved in 12 cases at the same time, eyes