1982年联帮德国有25,317人死于气管、支气管和肺的恶性肿瘤。鉴于Ⅱ期以上肺癌疗效有限,人们愈加重视肺癌早期诊断。现综述美国有关临床研究早期诊断的资料如下。1971～1979年美国Johns Hopkins Lung Project(JHLP)、Memoriat Sloan—Kettering National Lung Program(MSKP)和Mayo Lung Project(MLP)3个研究中心对3万多人按计划进行肺癌早期诊断的 In 1982, 25,317 Germans died of tracheal, bronchial, and lung malignancies. In view of the limited curative effect of stage II or above lung cancer, people pay more attention to the early diagnosis of lung cancer. The following is a summary of the United States on the early diagnosis of clinical research as follows. From 1971 to 1979, the three research centers of the Johns Hopkins Lung Project (JHLP), Memoriat Sloan-Kettering National Lung Program (MSKP), and Mayo Lung Project (MLP) in the United States conducted an early diagnosis of lung cancer for more than 30,000 people.