Because the average age at diagnosis is 71-73, men are likely to die from other causes before prostate cancer claims their life. And there is no credible evidence that low-grade prostate cancer uniformly progresses to higher-grade cancers, so early treatment is not essential.
由于患者的平均诊断年龄是71—73岁，因此很可能在前列腺癌夺走生命之前就因其他原因逝世了。也没有可信证据表明早期前列腺癌会毫无例外地转变为晚期癌症，因此早期治疗并不是必须的。