炎症性肠病(IBD)是一种病因尚不明确的慢性非特异性肠道炎症性疾病,包括溃疡性结肠炎(UC)和克罗恩病(CD)。前者是一种慢性非特异性结肠炎症,病变主要累及结肠黏膜和黏膜下层,范围多自远段结肠开始,可逆行向近段发展,甚至累及全结肠及末段回肠,呈连续性分布,临床主要表现为腹泻、腹痛和黏液脓血便。后者为一种慢性肉芽肿性炎症,病变可累及胃肠道各部位,以末段回肠及其邻近结肠为主,呈穿壁性炎症,多呈节段性、非对称性分布,临床主要表现为 Inflammatory bowel disease (IBD) is a chronic, nonspecific, inflammatory bowel disease of unknown etiology, including ulcerative colitis (UC) and Crohn’s disease (CD). The former is a chronic non-specific inflammation of the colon, the lesion mainly involving the colon mucosa and submucosa, ranging from the distal colon, can be retrograde to the proximal segment, or even involving the whole colon and the distal ileum, was continuous distribution, clinical main Manifested as diarrhea, abdominal pain and mucus pus and blood. The latter is a chronic granulomatous inflammation, lesions can affect various parts of the gastrointestinal tract to the distal ileum and its adjacent colon-based, was perforated wall inflammation, mostly segmental, asymmetrical distribution, the main clinical Performance is