Crohn’s disease can affect anywhere from the mouth all the way down to the anus. We have what we call Crohn’s Colitis, which is Crohn’s Disease specifically of the colon. There’s Crohn’s ileocolitis, which means Crohn’s Disease that affects the last portion of the small intestine as well as the colon. And then there’s just small bowel Crohn’s Disease. That’s the most common type of Crohn’s Disease that affects anywhere in the small bowel. A minority of patients have Crohn’s Disease that is isolated to the upper digestive tract, so the esophagus, the stomach, or the upper digestive intestines.