The complications of Crohn's disease and ulcerative colitis (collectively known as inflammatory bowel disease, or IBD) are generally categorized as either local or systemic. The term "local" refers to a complication involving the intestinal tract itself. The term "systemic" (or extraintestinal) refers to complications involving other organs or complications that affect the patient as a whole -- rather than just the bowel.
To find out more about the extraintestinal complications of Ulcerative Colitis:
Extraintestinal Complications of IBD (Crohn's & Colitis Foundation of America)
