目的　探讨立体定向放射外科(SRS)治疗脑转移瘤的效果。方法　以全脑放疗加SRS或单用SRS治疗24 例(30 病灶)脑转移瘤。结果　大多数病例在SRS后1～2 周获不同程度的症状改善,肿瘤反应率为89 % ,平均存活期为10 月。结论　SRS是治疗小而边界清楚的脑转移瘤的有效手段,肿瘤控制率可达80 % 以上,SRS加全脑放疗可改善肿瘤控制率。SRS亦可用以治疗放疗后复发的脑转移瘤 Objective To investigate the effect of stereotactic radiosurgery (SRS) on brain metastases. Methods Whole brain radiotherapy with SRS or SRS alone was used to treat 24 patients (30 lesions) with brain metastases. Results In most cases, symptoms were improved to varying degrees 1 ~ 2 weeks after SRS. The tumor response rate was 89% and the average survival time was 10 months. Conclusion SRS is an effective treatment for small and well-defined brain metastases. The tumor control rate can reach more than 80%. SRS combined with whole brain radiation therapy can improve the tumor control rate. SRS can also be used to treat recurrent brain metastases after radiotherapy