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近半个世纪以来,世界上许多国家肺癌的发病率和死亡率均有不同程度的增长,特别是一些工业发达的国家,肺癌的流行还在明显增高,其增长的速度是令人吃惊的。例如:在1928年～1929年直到1972年的四十多年间中,英格兰、威尔士的男性肺癌实数从1991例升到25,761例,增加13倍;女性肺癌实数从760例升到5,897例,增加7倍多。随着人类生活和生产的不断发展,肺癌已成为一个单独的疾病而日益受到人们的重视。从职业角度研究肺癌,由于人群比较集中,接触致癌物的范围较为清楚无疑在探索肺癌的病因中具有重要意义。国际癌症研究中心(IARC)在美国国立癌症研究协同下,从一九七一年对世界各国人类由于化学物质致癌进行了研究,经大量调查,证明下列物
Nearly half a century, the incidence and mortality of lung cancer in many countries in the world have varying degrees of growth, especially in some industrialized countries, the prevalence of lung cancer is still significantly increased, the rate of its growth is surprising. For example, in the forty-odd years between 1928 and 1929 and 1972, the real number of lung cancer patients in England and Wales rose from 13 to 25,761 in 1991, while the real number of women with lung cancer rose from 760 to 5,897, an increase of 7 More times. With the continuous development of human life and production, lung cancer has become a single disease and increasingly people’s attention. From a professional point of view of lung cancer, due to the population is more concentrated, the scope of exposure to carcinogens more clearly undoubtedly explore the etiology of lung cancer is of great significance. The International Agency for Research on Cancer (IARC), in collaboration with the National Cancer Research Institute of the United States, conducted a study on human carcinogen caused by chemical substances in various countries in the world in 1971. After extensive investigations, it was proved that the following