恶性肿瘤是一个严重威胁人类健康的疾病,估计每年全世界因患恶性肿瘤而死亡的人数约500万左右。据有关方面统计,我国每年死于癌症的就有70万之众。由此可见,肿瘤的发病率、死亡率之高,防治工作也就显得十分重要了。尤其解放后一些传染病发病率显著下降,肿瘤一跃成为一个常见病多发病。肿瘤是可以治愈的。近几十年来,肿瘤的 Malignant tumors are a serious threat to human health. It is estimated that about 5 million people die from malignancy each year worldwide. According to relevant statistics, there are 700,000 people who die of cancer each year in China. It can be seen that the incidence and mortality of tumors are high and prevention and control work is very important. In particular, the incidence of some infectious diseases dropped significantly after the liberation and the tumor became a common disease. The tumor is curable. In recent decades, tumors