Ulcerative Colitis: Introduction - Johns Hopkins Medicine

Ulcerative colitis is an idiopathic inflammatory bowel disease that affects the colonic mucosa and is clinically characterized by diarrhea, abdominal pain and hematochezia. The extent of disease is variable and may involve only the rectum (ulcerative proctitis), the left side of the colon to the splenic flexure, or the entire colon (pancolitis). ................
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