摘要据世界卫生组织（World Health Organization．WHO）统计，每年肺癌的新增病例及死亡病例数在26种常见恶性肿瘤中居首位，且5年生存率低于15％。在我国，原发性肺部恶性肿瘤主要是原发性支气管肺癌，居肿瘤死亡率之首，即使早期非小细胞肺癌在手术后进行化疗，其5年生存率也仅为40％左右。
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