癌症 是一类由异常细胞不受控制地生长并可能扩散至身体其他部位的疾病。癌症种类繁多，是全球范围内导致死亡的主要原因之一。 癌症的定义 所谓 癌症，是指细胞在遗传调控失常的情况下无限制地分裂、扩散，并可能形成肿瘤（恶性肿块）。如果不加�

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