溃疡性结肠炎(Ulcerative Colitis,UC)是一种慢性非特异性结肠炎症,重者易发生溃疡。其病变范围多自远段结肠开始,可逆行向近段发展,乃至累及全结肠及末段回肠,主要累及结肠黏膜和黏膜下层。临床可表现为黏液脓血便、连续或反复发作的腹泻、腹痛、里急后重等。其主要并发症可有出血、穿孔、中毒性巨结肠、癌变等~([1])。本病病因 Ulcerative colitis (UC) is a chronic nonspecific colonic inflammation, ulcers are more likely to occur in severe cases. The lesions ranged from the distal colon, can be retrograde to the proximal development, and even involving the whole colon and the distal ileum, mainly involving the colon mucosa and submucosa. Clinical manifestations of mucus and blood stools, continuous or recurrent episodes of diarrhea, abdominal pain, tenesmus and so on. The main complications may have bleeding, perforation, toxic megacolon, cancer and so on ~ ([1]). Etiology of the disease