Posted 12/20/2007 8:17 PM (GMT -6)
The difference is usually in the pattern and location of inflammation. UC commonly has a solid area of inflammation, usually starting on the left side of the colon and working its way around, depending on severity. Crohn's has patchy inflammation and, as I understand it, is most often found in the small intestine, near where it attaches to the colon, but can actually strike just about anywhere in the digestive tract. When it appears in the colon, it's called Crohn's colitis to differentiate from UC.