炎症性肠病(inflammatory bowel disease,IBD)包括溃疡性结肠炎(ulcerative colitis,UC)和克罗恩病(Crohn′s disease,CD),有终生复发倾向,重症患者迁延不愈,预后不良。此病欧美发达地区发病率高,而亚洲国家随着生活水平的提高,其发病率呈现逐年上升趋势。IBD的病因和发病机制未完全明确,目前的研究认为由多因素相互作用所致,主要包括遗传、免疫、 Inflammatory bowel disease (IBD) includes ulcerative colitis (UC) and Crohn’s disease (CD), has a tendency to recurrence throughout life, delayed healing in critically ill patients, and poor prognosis. The disease incidence in developed areas in Europe and America is high, while Asian countries with the improvement of living standards, the incidence showed a rising trend year by year. The etiology and pathogenesis of IBD is not completely clear, the current research that caused by multi-factor interactions, including genetic, immune,