溃疡性结肠炎(UC)是一种反复发作的肠道慢性炎症性疾病,主要表现为结肠和(或)直肠黏膜充血水肿、浅表溃疡,伴黏液脓血便以及肠道功能障碍。UC的病因未明,发病率高,肠道长期慢性炎症的刺激容易发生恶变。UC还被报道与多种肠道外疾病相关,如硬化性胆管炎、关节炎、心包炎等。因此 Ulcerative colitis (UC) is a recurrent chronic inflammatory bowel disease characterized mainly by congestion and edema of the colon and / or rectum, superficial ulcers, mucus with mucus, and intestinal dysfunction. The etiology of UC is unknown, the incidence is high, long-term intestinal inflammation prone to malignant transformation. UC has also been reported with a variety of extraintestinal diseases, such as sclerosing cholangitis, arthritis, pericarditis and so on. therefore