有研究结果显示[1],WBRT 常常会并发严重的认知功能障碍,所以,在脑转移瘤中的作用也逐渐弱化。对于多个脑转移瘤,可选择 SRS 而非过早予以 WBRT 干预,能有较好的神经保护作用和更高的生存质量。
\n\n\n\n \n\n立体定向放疗主要用于:
\n\n
有研究显示[2][3],对于数目小于 10 个的脑转移瘤进行 SRS 可以获得和 WBRT 一样的效果,且不会并发严重的认知功能损伤。
\n\n\n\n \n\n目前,化疗还没有成为脑转移瘤的主要治疗手段,一般不用于初始治疗,而是作为其他治疗失败后的挽救治疗,或与其它治疗联合使用。
\n\n脑转移瘤化疗方案的选择主要依据原发肿瘤的病理类型和药物是否易于进入颅内,化疗效果根据原发肿瘤类型而有所不同:
\n\n\n\n血脑屏障的存在可能是脑转移瘤化疗效果不佳的主要原因。基于血脑屏障通过率,脑转移瘤化疗药物有以下几类,可作为药物选择的主要指标之一:
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