由于溃疡性结肠炎及克隆氏病两者具有许多共同点,如病因均未发现特殊的细菌、遗传因素及免疫反应,同样的发病年龄,慢性复发性的病程,相同的肠外伴发病以及类似的药物治疗等等,故近年来文献上将其合称为慢性炎症性肠病。溃疡性结肠炎是结肠粘膜的疾病,直肠往往无例外地被累及,甚至只有直肠单独患病, Since ulcerative colitis and Crohn’s disease have much in common, no specific bacteria, genetic and immune responses, similar age of onset, duration of chronic recurrent disease, the same parenteral complication, and similar Drug treatment and so on, so in recent years the literature will be collectively referred to as chronic inflammatory bowel disease. Ulcerative colitis is a disease of the colon mucosa, the rectum is often involved without exception, and even only the rectum alone,