Parambir S. Dulai, MD, and colleagues at the Division of Gastroenterology, University of California San Diego have written a thoughtful discussion on the problem with phenotypes in Crohn’s disease. We have long known that there are different types of disease, aggressiveness factors, and presentations. However, we tend to think of Crohn’s as one disease. Is the first step in breaking this down into smaller bites to divide Crohn’s into ileal and colonic disease?

See the article at Clinical Gastroenterology and Hepatology here.