发病率低、症状不典型、诊断较晚、恶性肿瘤居多、病种繁多且复杂、根治性较差,这些特点常是小肠肿瘤诊断延误并影响预后的因素,是小肠肿瘤诊断和治疗的难题,也是临床医师面临的难题。诊断小肠肿瘤的早期诊断比较困难,因为小肠肿瘤缺乏特异性的临床表现,约1/3的小肠肿瘤甚至没 Low incidence, atypical symptoms, late diagnosis, the majority of malignant tumors, a wide range of diseases and complex, poor curative effect, these characteristics are often delayed diagnosis of small bowel tumor and prognosis factors, is the diagnosis and treatment of small bowel tumor problems, It is also a problem for clinicians. Early diagnosis of small bowel tumors is more difficult to diagnose because of the lack of specific clinical manifestations of small bowel tumors and about 1/3 of the small bowel tumors are not even