Another major component of the ITR Core is the GENESYS Registry which has over 6800 patients recruited in all of digestive diseases. Of these patients, over 4400 have a diagnosis of inflammatory bowel disease (IBD). The vast majority of patients in the Genesys IBD registry have established care at the UofC, as represented by patients with 4 or more return visits. The size of the Genesys IBD registry has enabled the identification of patients with rare IBD phenotypes.