下段回肠是小肠疾病的好发部位,也是大肠疾病容易波及的部位。该处病变的X线造影检出率较低,有时即使剖腹探查,也常常因未取到病理组织而难于确诊。因而长期以来,下段回肠疾病的发病机理、组织学改变及治疗方面均未深入研究。晚近,纤维小肠镜问世为小肠疾病的研究创造了条件,直视取材提高了小肠疾病的诊断率。但是,采 The lower ileum is a predilection for small intestine disease, but also easily affected parts of the colorectal disease. X-ray findings of the lesion in the lower rate, and sometimes even laparotomy, but also often not taken because of pathological tissue and difficult to diagnose. For a long time, the lower part of the pathogenesis of ileal disease, histological changes and treatment are not in-depth study. Recently, the advent of fibro-intestinal enteroscopy has created the conditions for the study of small bowel diseases. Direct imaging increases the diagnostic yield of small intestinal diseases. However, mining