Based on the inaccuracies of the current classification scheme for inflammatory bowel disease (IBD), the failure of surgical pouches and the findings of retrospective observational trials to date, we hypothesize that a significant proportion of patients with UC will have small bowel involvement that will result in a change in diagnosis to CD or the recognition of a new phenotype of IBD. The aim of this study is to determine the prevalence of small bowel pathology in patients diagnosed with UC using WCE. This information will aid in the current efforts to re-classify IBD using improved endoscopic and imaging technologies, genetic information and serologic information.