Ulcerative colitis is an inflammatory bowel disease likely due to an autoimmune process. In North America, the prevalence of this disease is 1 per 1000, with a bimodal distribution of age of onset in the second and sixth decade of life.
The gastrointestinal (GI) symptoms include:
Intermittent diarrhea mixed with blood and mucous, more than ten episodes per day in severe disease
Intermittent rectal bleeding
The most common clinical signs and findings are:
Initially limited to rectum/distal colon in 33 %, extending proximally to the left colon in 33 %, pancolitis in the remaining 33 %