随着现代工业的发展 ,环境污染日益加重 ,肺癌发病率亦逐年上升。在欧美等发达国家肺癌死亡率已占恶性肿瘤之首 ,而我国近 2 0年来发病率亦显著增高。统计资料表明 :男性肺癌死亡率增加12 0 .93 % ,女性增加 90 .41% ;肺癌占总癌死亡率的百分比分别增加了 84.34%和93 .2 6 % ; With the development of modern industry, environmental pollution is aggravating day by day, and the incidence of lung cancer also increases year by year. In developed countries such as Europe and the United States, lung cancer mortality has accounted for the first of malignant tumors, while the incidence of lung cancer in China has also been significantly higher. Statistics show that: the mortality rate of male lung cancer increased by 12.93% and that of female increased by 90.41%; the percentage of lung cancer with total cancer mortality increased by 84.34% and 93.26% respectively;