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食道癌是消化道癌中发病率差别最突出的肿瘤之一。南非特兰斯克的豪萨人发病率很高,其邻邦莫桑比克则很低(相差10～20倍);在伊朗贡巴德地区相距300公里的两地,食管癌发病率女性相差30倍,男性相差10倍;我国华北太行山区周围发病率很高,远离太行山区的地区则较低,这说明地理分布不同反映环境因素不同,而环境因素可通过饮食因素起作用。 近年来营养与肿瘤的关系受到世界各国重视,食管癌的流行病学和病因学研究上有
Esophageal cancer is one of the most prominent tumors in the digestive tract cancer. The Hausa population in Transylvania, South Africa, has a high prevalence. Its neighboring country, Mozambique, is very low (a difference of 10 to 20 times); in the two regions 300 km away in Gumbad, Iran, there is a 30-fold difference in the incidence of esophageal cancer among women. The difference is 10 times; the incidence rate around the Taihang Mountain area in North China is very high, and the area far from the Taihang Mountain area is lower. This shows that different geographical distribution reflects different environmental factors, and environmental factors can play a role through dietary factors. In recent years, the relationship between nutrition and cancer has attracted the attention of various countries in the world. There are epidemiological and etiological studies on esophageal cancer.