“Crohn’s disease and ulcerative colitis are both inflammatory bowel diseases with many similarities. Nevertheless, there are some key differences between the two conditions that affect how they are managed. Both Crohn’s diseases and ulcerative colitis cause digestive distress and inflammation in the gastrointestinal tract. However, unlike Crohn’s disease, ulcerative colitis is linked to a response of the immune system.
Crohn’s disease is a chronic inflammatory condition of the gastrointestinal (GI) tract. It belongs to a group of conditions known as inflammatory bowel diseases (IBD).
Crohn’s disease most often affects the end of the small intestine and the beginning of the colon, but it may also affect any part of the GI tract from the mouth to the anus.”
Medical News Today (Crohn’s disease versus ulcerative colitis: What is the difference? medicalnewstoday.com)