20世纪早期及以前,肺癌在世界范围内还是一种少见的癌症,进入本世纪后,英美等发达国家男性肺癌死亡率急骤上升,目前这一趋势已遍及世界各国,发达国家肺癌发病率和死亡率维持或上升在一个较高水平,而发展中国家则增幅显著。从60年代前后起,女性肺癌发病率也开始上升。目前肺癌已成为世界上最重要的癌症之一,特别是在城市已列癌 In the early 20th century and before, lung cancer was a rare cancer in the world. After entering this century, the death rate of lung cancer among men in developed countries such as the United States and the United States has risen sharply. This trend has been spread all over the world. The incidence and mortality of lung cancer in developed countries The rate is maintained or increased at a relatively high level, while that of developing countries is significantly higher. Since the 1960s, the incidence of female lung cancer has also begun to rise. At present, lung cancer has become one of the most important cancers in the world, especially in cities.