目的：探讨巨大听神经瘤治疗抉择，从而降低并发症。方法：通过36例巨大听神经瘤显微手术大部分切除肿瘤，残留肿瘤行伽玛刀治疗，并进行观察。结果：手术后无神经功能废损，伽玛刀治疗后随访2 ～4年，肿瘤被有效控制。结论：显微手术后配合伽玛刀治疗巨大听神经瘤可作为减少术后并发症，提高生活质量的有效手段。
目的：探讨和分析巨大听神经瘤手术面神经保留技术。方法:在面神经监护的条件下，57例巨大听神经瘤病人,采用枕下乙状窦后入路,显微外科切除肿瘤。术中观察肿瘤与面神经的病理解剖关系,术后随访时间6个月至5年。结果:肿瘤全切除54例（94.7％）,次全切3例(5.3%)。面神经解剖完整保留52例(91%),面神经解剖部分保留5例(9%)。结论:在有效的术中面神经功能监测条件下，出色的显微外科技术以及对面神经解剖关系的充分认识是面神经解剖保留的基础。识别不与肿瘤粘连的面神经脑干端或内听道端,再沿面神经锐性分离肿瘤,是面神经解剖保留的技术关键。
【摘要】 目的 比较手术及伽马刀治疗lt;3 cm听神经瘤的优劣。 方法 由2名研究人员分别检索1990年1月1日—2010年3月31日四川大学网上图书馆CENTRAL、ISI、Medline、Embase、NLM Gateway、CBMdisc等数据库的相关论文，选择证据级别最高的文献，使用Cochrane图书馆提供的RevMan 5.0软件，对手术和伽马刀治疗小型听神经瘤在面神经、听力功能保留的优劣方面进行Meta分析。 结果 共检索到4篇前瞻性队列研究，排除2篇。剩余的2篇文献共纳入患者173例，分析发现，在1年随访及随访结束时，手术治疗组与伽马刀治疗组相比，在面神经功能完整保留方面，P值及其95%CI分别为0.64（0.53，0.77）、0.67（0.47，0.96）；在保留有用听力方面，P值及其95%CI分别为0.08（0.02，0.27）及0.08（0.02，0.28）。 结论 伽马刀治疗lt;3 cm的听神经瘤，无论在保留有用听力还是面神经功能方面均明显优于手术。【Abstract】 Objective To compare surgery and gamma-knife treatment in treating acoustic neuroma less than 3 cm in diameter through Meta analysis. Methods Two researchers respectively searched relevant papers from such databases as CENTRAL, ISI, Medline, Embase, NLM Gateway, and CBMdisc posted on the online library of Sichuan University. Papers with the highest-grade evidence were selected, and RevMan 5.0 provided by Cochrane Library was used to compare surgery and gamma-knife treatment in the preservation of patients’ facial nerves and useful hearing through Meta analysis. Results Four prospective cohort studies were found, two of which were excluded. The remaining two articles were analyzed, and we compared surgery and gamma-knife treatment during the 1-year and the last follow-up period in facial nerve preservation and useful hearing preservation. The P value and 95% CI of the comparison was respectively 0.64 (0.53, 0.77) and 0.67 (0.47, 0.96) for facial nerve preservation, and 0.08 (0.02, 0.27) and 0.08 (0.02, 0.28) for useful hearing preservation. Conclusion Gamma-knife treatment for acoustic neuroma less than 3 cm in diameter is a much better choice than surgery in preserving hearing and facial nerve function.
ObjectiveTo study the anatomicopathological relation between facial nerve (FN) and acoustic neuronoma (AN) and summarize the techniques of how to protect facial nerves in microsurgery. MethodsA retrospective analysis of 585 patients with acoustic neuronmas treated by microsurgery for the first time between January 2007 and March 2012 was carried out. Anatomicopathological relation between FN and AN and protection of the facial nerve were described. ResultsThe tumors were totally removed microsurgically in 552 patients, and the total removal rate was 94.4%. Subtotal removal was performed in 33 patients. Facial nerve was anatomically preserved in 558 cases, and the rate of facial nerve preservation was 95.4%. After one-year follow-up, 549 patients had House-Brackmann Ⅰ-Ⅳ function. The location and shape of the FN along the tumor was identified as the follows: FN displaced along the ventral and superior surface of the tumor in 279 patients (47.7%), the ventral and central in 243 (41.5%), the ventral and inferior in 33 (5.6%), the dorsal in 10, the superior pole in 6, the inferior pole in 3, and FN surrounded in 11. ConclusionGood understanding of the meaning of anatomicopathological relation between FN and AN, intraoperative monitoring and perfect microneurosurgical skills are important in achieving the goal of total resection of acoustic neuromas and anatomic reservation of the facial nerve.
ObjectiveTo analyse the microsurgical treatment and facial nerve preservation of giant acoustic neuromas. MethodsUnder the conditions of facial nerve monitoring, 400 patients with giant acoustic neuromas underwent microsurgical removal via suboccipital retrosigmoid approach between January 2005 and January 2013. There were 186 males and 214 females, with the age ranged from 15 to 74 years (mean, 41.6 years). The disease duration was 2-13 years (mean, 2.4 years). The lesions were located at the left cerebellopontine angle region (CPA) in 191 cases, right CPA in 200 cases, bilateral CPA in 9 cases. The clinical manifestations included unilateral hearing loss and tinnitus as first symptoms in 389 cases, facial numbness in 373 cases, unilateral facial paralysis in 370 cases, headache in 269 cases, lower cranial nerve symptoms with drinking cough and dysphagia in 317 cases, and unstable gait in 342 cases. Preoperative skull base thin layer CT showed varying degrees of horn-like expansion in ipsilateral internal auditory canal opening. MRI showed cysts in 78 cases and solid masses in 322 cases; with hydrocephalus in 269 cases. Postoperative cranial MRI or CT was taken to observe the extent of tumor resection. The preservation of facial nerves in anatomy was assessed by intraoperative microscope video and electrophysiological monitoring; the facial nerves function was assessed according to House-Brackmann (HB) classification on the first day after operation; and the rehabilitation of facial nerve function was also assessed at discharge and at 1 year postoperatively by using HB grade. ResultsTotal tumor removal was achieved in 372 cases (93.00%), and subtotal removal in 28 cases (7.00%). One case died of delayed brainstem ischemia at 14 days after operation, and 1 case died of lung infection at 20 days after operation; 398 cases were followed up 6 months to 8 years (mean, 3.5 years). Recurrence occurred in 1 case because of neurofibromatosis at 5 years after operation. The rate of anatomical preservation of the facial nerve during operation was 91.75% (367/400), and the functional preservation rate at the first day after operation was 62.75% (251/400). The HB grade of facial nerve function showed significant difference aomng 3 time points (at the first day, at discharge and at 1 year after operation) (χ2=23.432, P=0.000). Complications included postoperative intracranial infection in 11 cases (2.75%), cerebrospinal fluid leakage in 29 cases (7.25%), aggravated lower cranial nerve symptoms in 18 cases (4.50%), subcutaneous effusion in 13 cases (3.25%), second operation to remove hematoma in 9 cases (2.25%), postoperative circumoral herpes simplex virus infection in 25 cases (6.25%), and all complications were cured after symptomatic treatment. Postoperative hydrocephalus disappeared in 261 cases. ConclusionSurgical operation is the first choice in the treatment of giant acoustic neuromas. Under the auxiliary of neural electrophysiological monitoring, the microsurgery operation via suboccipital retrosigmoid approach for giant acoustic neuromas has extremely low mortality and high preservation rate of facial nerve function.
Microsurgery has always been the main treatment for large vestibular schwannomas. With the progress of microsurgical technique and neuroimaging, the application of the intraoperative physiological monitoring technology, as well as the popularization of the concept of minimally invasive neurosurgery, the current development trend of surgery for vestibular schwannomas is to realize both the maximal tumoral resection and the maximal preservation of facial nerve function, which puts more emphasis on the improvement of quality of life. It is still a challenge for neurosurgeons to resect the tumor to the maximum extent and preserve the nerve function as well. In view of this background, the strategy of " near-total resection” and " subtotal resection” combined with stereotactic radiotherapy has been more and more accepted in the past years. However, as a neurosurgeon, the ultimate goal should be " gross-total resection of tumor” and preservation of the nerve function as well. For those tumors severely adherent to neurovascular structure, " near total resection” might be a rational choice. Meanwhile, long-term follow-up should be conducted to clarify the biological behavior of tumor residues, as well as the necessity and long-term effect of stereotactic radiotherapy.