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胃癌的地理分布较为广泛。中国和日本胃癌的高低发区的分布差别十分明显。高低发区的病理组织学类型各异,肠型胃癌在高发区较低发区似乎更多见,同时胃癌前疾病的发病率也比低发区为高。日本死于胃癌的人数从1968年以来逐年下降,治疗水平的提高是一个很重要原因,更重要的原因是日本的现代化饮食方式。
The geographical distribution of gastric cancer is more extensive. The distribution of high and low incidence of gastric cancer in China and Japan is very different. The histological types of high and low areas are different, and intestinal type gastric cancer seems to be more common in areas with lower incidence in high incidence areas. The incidence of precancerous gastric disease is also higher than that in low incidence areas. The number of people who died of gastric cancer in Japan has decreased year by year since 1968. The increase in treatment level is a very important reason. The more important reason is Japan’s modern diet.