肺癌是严重危害人类生命健康的恶性肿瘤之一。云南锡业公司（云锡，ＹｕｎｎａｎＴｉｎＣｏｒｐｏｒａｔｉｏｎ，ＹＴＣ）矿工肺癌发病率在中国最高，男性矿工肺癌死亡率是中国其它地方的１０倍［１］。而该公司所处的云南省个旧市男性肺癌死亡率也高居全国之首，为全国平均水 Lung cancer is one of the malignant tumors that seriously endanger human life and health. The incidence of lung cancer among mine workers in Yunnan Tin Company (Yunnan Tin Corporation, YTC) is the highest in China, and the death rate of lung cancer among male miners is 10 times that of other parts of China [1]. The death rate of lung cancer among men in Gejiu City, Yunnan Province where the company is located is also the highest in the country, which is the average national water quality.