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原发性小肠肿瘤发病率占胃肠道肿瘤3.53%(111/3144),小肠恶性肿瘤占胃肠道恶性肿瘤2.72%(28/2860)。小肠肿瘤分布部位越高,发病率越低,十二指肠占5.4%,空肠占16.21%,回肠占28.37%。癌好发于回肠和十二指肠,肉瘤多见于回肠。小肠肿瘤临床诊断困难,手术前确诊者仅占19%。多数病例剖腹探查后方明确诊断。治疗以手术切除为主。预后较差,癌五年生存率21.4%,肉瘤五年生存率18.1%。
The incidence of primary small bowel tumors accounted for 3.53% (111/3144) of gastrointestinal cancers, and small intestinal malignancies accounted for 2.72% (28/2860) of gastrointestinal cancers. The higher the distribution of small intestine tumors, the lower the incidence was, 5.4% in the duodenum, 16.21% in the jejunum, and 28.37% in the ileum. Cancer occurs in the ileum and duodenum, and sarcoma is more common in the ileum. The clinical diagnosis of small intestine tumors is difficult, with only 19% of patients diagnosed before surgery. Most cases were diagnosed after laparotomy. The main treatment is surgical resection. The prognosis is poor. The five-year survival rate of cancer is 21.4%, and the five-year survival rate of sarcoma is 18.1%.