The transformation of a traditional mobile into cancer is akin to a chain response attributable to initial errors, which compound into extra significant mistakes, Each and every progressively allowing the cell to escape far more controls that limit ordinary tissue expansion. This rebellion-like scenario is an unwanted survival of your fittest, wherever the driving forces of evolution work against the body's style and design and enforcement of purchase.
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免疫治疗是当前的研究前沿热点内容，我们也专门总结了一篇免疫治疗方法(详见， 放链接)。其目的主要是通过激发、增强患者本身免疫细胞的免疫功能进行控制、 杀灭肿瘤、以及自身的抗癌过程。其部分方法已开始临床应用，但需要注意多数免疫 治疗还不够成熟，且价格相对高昂，绝大多数仍处于研究阶段。
乙肝病毒、丙肝病毒和某些类型的人乳头瘤病毒可分别增加罹患肝癌和宫颈癌的危险。艾滋病毒感染会使患宫颈癌的风险增加六倍，并还会大幅增加患其他癌症，如卡波西肉瘤的风险。
許多預防癌症的想法是根據流行病學的研究而來，分析病患的資料可發現生活方式或是接觸一些環境危險因子的確與特定癌症的發生機率相關。越來越多的證據顯示，根據流行病學研究所提出的建議改善，確實可以讓癌症發病率和死亡率降低。
確診為癌症後就要進一步做癌症屬於哪一期之分期檢查，觀察是否有轉移，並定期追蹤以免癌症復發，以便醫師擬定治療方向。（延伸閱讀：癌症診斷的目的與方法）
Those with cancer have a heightened hazard of blood clots in their veins which can be life-threatening.[210] 癌症 Using blood thinners like heparin reduce the chance of blood clots but have not been revealed to increase survival in those with most cancers.[210] Individuals that just take blood thinners also have a heightened danger of bleeding.[210]
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腫瘤較小且尚未擴散/轉移（癌細胞可被定位、手術移除，不需借助循環全身的化學藥物治療）
不斷增生的癌細胞撐破腫瘤，癌細胞因而擴散至腫瘤周遭的組織及鄰近的淋巴結甚至更遠處。此時癌細胞流竄於原始病灶附近，必需借助循環全身的化學治療藥物治療。
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A mutation during the mistake-correcting machinery of a mobile could bring about that mobile and its young children to accumulate errors more rapidly.
Several nationwide health care pointers recommend early palliative look after people whose most cancers has manufactured distressing symptoms or who require assist coping with their disease.
烟草使用、酒精消费、不健康饮食、缺乏身体活动和空气污染是癌症（以及其他非传染性疾病）的危险因素。