中国是世界上食管癌发病率和死亡率最高的国家,而河南省林州市及其毗邻的安阳等地,是我国也是世界上食管癌发病率和死亡率最高的地区[1]。过去50年对该地区人群食管癌的发生机制研究提示,食管癌的发生是环境和遗传因素共同作用的结果。环境因素如亚硝胺、霉菌、营养不良及蔬菜 China is the country with the highest morbidity and mortality of esophageal cancer in the world, and Linzhou City, Henan Province and its neighboring Anyang are the regions with the highest incidence and mortality of esophageal cancer in our country and in the world [1]. The past 50 years on the population esophageal cancer in the mechanism of the study suggests that the occurrence of esophageal cancer is the result of environmental and genetic factors together. Environmental factors such as nitrosamines, molds, malnutrition and vegetables