中国癌症诊断时的年龄分布（岁）

从图上各年龄组的分布可以看出，年龄是最大的危险因素，大多数癌症在５０到６４年龄开始增加，６５岁以上为癌症高发年龄！

Aging is the single biggest risk factor for developing cancer. However, the aging process is complex, and each person ages at a different rate. This means your actual age may not reflect your physiologic age, which can be estimated based on how well your body is functioning both physically and mentally.