肺癌是人类最常见的恶性肿瘤之一,对人类的健康和生命威胁极大〔1〕。世界卫生组织统计,全球肺癌发病率每年增加0·15%,在我国肺癌也已经成为发病率上升最快的癌症之一。研究显示,与肺癌易感性存在一定相关性的基因主要有2种,许多代谢酶基因与修复酶基因多态性可能与肺癌易感性 Lung cancer is one of the most common human malignant tumors, the human health and life-threatening [1]. According to statistics from the World Health Organization, the global incidence of lung cancer increases by 0.15% annually. In China, lung cancer has also become one of the cancers with the highest incidence rate. Studies have shown that there are two major genes that have some correlation with susceptibility to lung cancer, many of the gene polymorphisms of the gene for metabolism and repair enzymes may be associated with lung cancer susceptibility