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1.肺癌: 在一些有疾病登记的国家,发现近几十年来肺癌死亡率有显著的增加。其增长率男性高于女性,并与抽烟的不断增加似有一致的趋势。 十个国家的30例追踪研究和加拿大、英、美等国家的研究指出,肺癌的增多直接与吸烟的增加成正比。 在若干尸检中看到吸烟者的支气管有广泛的组织病变,其严重程度与吸烟数有关联,并可能是癌前期的病变。这些病变特别在肺癌病人中广泛出现,而在非吸烟者和以前吸过现已不吸的人中则少见。
Lung Cancer: In some countries with disease registrations, there has been a significant increase in lung cancer deaths in recent decades. The rate of increase is higher for males than females and seems to be in line with increasing smoking. Thirty studies in ten countries and studies in Canada, the United Kingdom, the United States and elsewhere point out that the increase in lung cancer is directly proportional to the increase in smoking. In several autopsies, the smoker’s bronchus has been shown to have a wide range of histological lesions, the severity of which is related to the number of smokers and may be a precancerous lesion. These lesions are particularly prevalent in patients with lung cancer, but are uncommon among non-smokers and those who were previously non-smokers.