慢性非特异性溃疡性结肠炎(简称溃疡性结肠炎),世界卫生组织称为“特发性结肠炎”。本病与局限性肠炎(克隆氏病)统称“慢性炎症性肠病”。本病是慢性腹泻的一种较常见疾病,发病率近年来有增加趋势。西欧各国成年人发病率每年为0.3～8/10万人口。 Chronic non-specific ulcerative colitis (referred to as ulcerative colitis), the World Health Organization called “idiopathic colitis.” The disease and localized enteritis (Crohn’s disease) collectively referred to as “chronic inflammatory bowel disease.” The disease is a common disease of chronic diarrhea, the incidence has increased in recent years. The incidence of adults in Western European countries is 0.3 to 8 per 100 000 inhabitants annually.