Crohn disease

**Definition:** Crohn disease is characterised by chronic and relapsing transmural inflammation extending through all layers of the small and/or large intestinal walls and has potential to involve the patient’s entire gastrointestinal tract.

**Inclusions:** - Granulomatous enteritis - Intestinal ulcer and erosion due to Crohn disease - Regional enteritis

**Exclusions:** - Ulcerative colitis