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十二、桥小脑角(CPA)肿瘤最常见者是听神经瘤,Wiegand等报告1949～1984年间美国若干单位术后随访的患者528例:男172,女356例;年龄8～84岁;左、右侧罹患机率相近;85%有听力减退,60%有平衡障碍,56%有耳鸣作为早期症状,20%于确诊前已有6年以上病史,68%病例系由耳科医生所确诊。手术径路:经迷路362例,枕下颅后窝经路52例,经颅中窝33例;74%有面神经受累,61%患者的面神经功能恢复低于50%。Wigand等推荐采用经颅中窝和迷路后联合径路切除听神经瘤,术中切断岩上窦可使术野扩大,适用于直径达4 c m的肿瘤,仍可保存耳蜗神经,共做75例,61例获得全部切除,14例曾补加第二期枕下入路手术,
Twelve, bridge cerebellopontine angle (CPA) tumors are the most common acoustic neuroma, Wiegand and other reports from 1949 to 1984 in the United States a number of units were followed up by 528 patients: male 172, female 356 cases; aged 8 to 84 years old; left, The right side has a similar chance of suffering; 85% have hearing loss, 60% have balance disorders, 56% have tinnitus as an early symptom, 20% have a history of more than 6 years before diagnosis, and 68% are diagnosed by an otologist. Surgical pathways: 362 cases of labyrinthine, 52 cases of suboccipital posterior cranial fossa, and 33 cases of transcranial fossa; 74% had facial nerve involvement, and facial nerve function recovery was below 50% in 61% of patients. Wigand et al recommended the use of transcranial fossa and posterior labyrinth combined pathways to remove acoustic neuromas. Intraoperative sinus sinus can be used to expand the surgical field. It is suitable for tumors up to 4 cm in diameter, and cochlear nerves can still be preserved. A total of 75 cases were included in 61 cases. All excisions were obtained, and 14 cases had supplemented the second suboccipital approach.