溃疡性结肠炎是一种病因不明的慢性炎症性肠病,部分病人在病程中可合并一种或多种的局部和肠外的合并症。最严重的局部合并症有中毒性巨结肠、结肠穿孔和大量出血,亦常见并发假性息肉、结肠狭窄、结肠直肠癌,偶有发生肛裂、肛周脓肿等。肠外 Ulcerative colitis is an unexplained chronic inflammatory bowel disease, some patients may be combined in the course of one or more of the local and extraintestinal complications. The most serious local complications of toxic megacolon, colon perforation and massive bleeding, but also common pseudo-polyps, colon stenosis, colorectal cancer, occasional anal fissure, perianal abscess and so on. Parenteral