溃疡性结肠炎(Ulcerativecolitis,UC)是一种病因不清的直肠和结肠慢性特异性炎症性疾病。临床上主要表现为腹泻、脓血便、腹痛、里急后重、体重减轻及偶伴发热。UC病程漫长,可有多次缓解和复发,不易彻底治愈。UC的组织损伤主要是由扩大的炎症反应造成的,阻止其中的任何一个环节 Ulcerative colitis (UC) is an unclear disease of the rectum and chronic colon-specific inflammatory disease of the colon. The main clinical manifestations of diarrhea, pus and blood, abdominal pain, tenesmus, weight loss and occasional fever. A long course of UC, there may be multiple remissions and recurrence, not completely cured. Tissue damage in UC is mainly caused by an enlarged inflammatory response that stops any one of them