原发性肺癌的发病率,近二、三十年来迅速增高,目前,其在47个国家已跃居为常见恶性肿瘤的第一、二位。在一些工业较发达的国家其死亡人数,二十年间增加了500%。上海卢湾区肺癌死亡率增加了七倍多。目前肺癌的长期存活率仍未超过10%,原因主要是未能做到早期发现,早期诊断和早期治疗。北京医学院报告118例肺癌中属于早期的只有15例,占12.7%。日 The incidence of primary lung cancer has rapidly increased in the past two to three decades. At present, it has become the first and second most common malignant tumor in 47 countries. The death toll in some industrially more developed countries has increased by 500% in 20 years. Lung cancer mortality in Luwan District in Shanghai has increased by more than seven times. The long-term survival rate of lung cancer still does not exceed 10%, mainly due to the failure to achieve early detection, early diagnosis and early treatment. Beijing Medical College reported that only 118 cases of early stage lung cancer accounted for 12.7%. day