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90%以上的肿瘤是后天人为因素造成的,虽然肿瘤的确切病因还不十分明确,但因细胞基因变异诱发肿瘤多与不良生活方式有关,仅1%~3%的肿瘤符合遗传规律。
More than 90% of the tumors are caused by acquired human factors. Although the exact cause of the tumor is not yet clear, due to gene mutation in the cells, tumors are associated with unhealthy lifestyles. Only 1% to 3% of the tumors meet the genetic laws.