癌症病因是目前医学科学研究的重要课题之一。已有的研究成果表明,人们的膳食、营养、食品污染与癌症发病有关。膳食与癌症的关系流行病学调查表明,某些癌症的分布有明显的地区性。我国食道癌主要集中在太行山南段的山西、河北、河南三省交界地带,四川西北的盐亭、阆中、南部三县交界地区,以及广东的南澳岛。此 The cause of cancer is one of the important topics in the medical science research at present. Existing research shows that people’s diet, nutrition, food contamination and cancer incidence. The relationship between diet and cancer Epidemiological survey showed that the distribution of certain cancers have obvious regional. Esophageal cancer in China is mainly concentrated in the junction of Shanxi, Hebei and Henan provinces in the southern part of Taihang Mountains, the junction of Yanting, Langzhong and southern counties in the northwest of Sichuan and Nan’ao Island in Guangdong. this