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原发性空迴肠癌极少见,作者报告过去10年间经治3例并收集日本文献报导的共200例,予以分析。一般认为小肠癌仅占全消化道癌的0.2～0.3%;全肠管癌中,小肠癌占0.84～2.9%。如把十二指肠除外,空迴肠癌更少。小肠癌少的原因,系认为小肠内无菌,肠内容流动通过迅速,不易接受机械性化学性刺激。Lowenfels指出,小肠特别是迴肠有丰富的淋巴组织,是内因性抗癌结构。小肠癌发生频度,依十
Primary uropelvic cancer is rare. The authors reported that in the past 10 years, 3 cases had been treated and 200 cases of Japanese literature were collected for analysis. It is generally believed that small intestine cancer accounts for only 0.2-0.3% of total gastrointestinal cancer; in total intestinal cancer, small intestine cancer accounts for 0.84-2.9%. Excluding the duodenum, there is less empty colon cancer. The reason for the small amount of small bowel cancer is that the small intestine is sterile, and the contents of the intestines flow quickly and are not susceptible to mechanical chemical stimuli. Lowenfels pointed out that the small intestine, especially the ileum, is rich in lymphoid tissues and is an endogenous anticancer structure. The frequency of small bowel cancer, according to ten