据统计,1955年以来日本胃癌年龄标化死亡率在不断下降。作者认为单是诊断和治疗的提高,不足以解释,二次世界大战后日本人饮食“西化”亦是重要因素。作者分析了1955～1974年间所切除的胃癌标本4147例直径均大于1cm。组织学分类粗分为分化良 According to statistics, the age-standardized mortality rate of gastric cancer in Japan has been declining since 1955. The author believes that the increase in diagnosis and treatment alone is not enough to explain that the westernization of the Japanese diet after the Second World War is also an important factor. The authors analyzed 4147 cases of gastric cancer specimens resected from 1955 to 1974 with diameters greater than 1 cm. The histological classification is roughly divided into well-differentiated