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  1. Hace 17 horas · Ulcerative colitis ( UC) is one of the two types of inflammatory bowel disease (IBD), with the other type being Crohn's disease. [1] It is a long-term condition that results in inflammation and ulcers of the colon and rectum. [1] [7] The primary symptoms of active disease are abdominal pain and diarrhea mixed with blood ( hematochezia ). [1]