对 8例重症肌无力 (m yasthenia gravis,MG)伴胸腺瘤患者行 X-刀治疗 ,结果显示稳定缓解 5例 ,药物缓解 2例 ,部分缓解 1例。未见明显的肌无力加重或诱发危象及其它不良反应 ,其中 5例术后 6个月复查纵隔 CT或 MRI发现胸腺瘤体积较治疗前缩小 ,1例无明显变化。 8例患者治疗前后的 Ach Rab和 CAEab滴度均有下降。提示 :该方法疗效可靠 ,具有微侵袭、高精度、准确安全的特点 ,对病情危重、年龄大、不宜手术治疗的合并胸腺异常的 MG患者是一种安全有效的治疗方法 Eight patients with myasthenia gravis (MG) with thymoma were treated with X-knife. The results showed stable remission in 5 cases, drug remission in 2 cases and partial remission in 1 case. No obvious muscle weakness or induced crisis and other adverse reactions, of which 5 cases after 6 months of review of mediastinum CT or MRI found thymoma volume reduced compared with before treatment, 1 case no significant change. 8 patients before and after treatment of Ach Rab and CAEab titers have decreased. Tip: The method is reliable, with minimal invasion, high precision, accurate and safe. It is a safe and effective treatment for MG patients with critical thymus, older age and unfit for surgical treatment of thymus abnormalities