全脑放射治疗是多发脑转移瘤的基本放疗手段，立体定向放射治疗只适用于某些脑转移瘤患者。

Whole brain radiation is the basic method of multiple brain metastasis. Stereotactic radiosurgery is only applicable to some patients.

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目的：观察多发性脑转移瘤伽玛刀治疗后生存时间的影响因素。

Objective to observe the factors of effect in multiple brain metastasis (MBM) treated by gamma knife radiosurgery (GKS).

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