Xeljanz, Xeljanz XR (tofacitinib): Drug safety communication — Initial safety trial results find increased risk of serious heart-related problems and cancer with arthritis and ulcerative colitis medicine. U.S. Food and Drug Administration. https://www.fda.gov/safety/medical-product-safety-information/xeljanz-xeljanz-xr-tofacitinib-drug-safety-communication-initial-safety-trial-results-find-increased?utm_medium=email&utm_source=govdelivery. Accessed July 24, 2024., IBD Testing: Options for the Present and Future What is the difference between diagnostic and prognostic testing for Crohn's disease or ulcerative colitis? Elisa Boden, MD, and Gerard Honig, PhD discuss diagnostic and prognostic testing options for patients with IBD., Untreated inflammatory bowel disease (IBD) can lead to more serious health problems. It is important to talk to your doctor if you notice IBD symptoms so you can start managing and treating it right away. To diagnose IBD, a doctor may do physical exams, lab tests, endoscopic procedures, and radiographic procedures..