肺癌是人类健康面临的严重威胁之一。近几十年来肺癌的发病率和死亡率迅速增长,在工业发达国家已跃居男性恶性肿瘤之首。我国东北、华北、华东沿海等几个较大的工业城市和云南等地的矿区,肺癌的发病率和死亡率也在逐年上升。肺癌的治疗方法虽经不断改进, Lung cancer is one of the serious threats to human health. In recent decades, the incidence and mortality of lung cancer have grown rapidly, and it has ranked the first in male industrial malignancies in industrialized countries. The incidence and mortality of lung cancer are also rising year by year in several large industrial cities such as the Northeast, North China, and East China coasts and mining areas in Yunnan and other places. Although the treatment of lung cancer continues to improve,