The two main Inflammatory Bowel Diseases (IBD) include Crohn’s Disease and Ulcerative colitis. Although they are both grouped as inflammatory bowel diseases, there are significant differences between the two. This daily doodle tries to illustrate these differences. The top half is Crohn’s Disease which is characterized by deep geographic ulcers and transmural inflammation. Crohn’s Disease is patchy and often spares the rectum. Ulcerative colitis (bottom half of doodle) typically starts at the rectum and progresses continously through the colon… Ulcerative colitis is on the bottom and it starts from the bottom…

Lectures: Large Bowel Pathology and Immune-mediated Disorders of the GI Tract.