Noninfectious enteritis or ulcer of small intestine

**Definition:** Noninfectious enteritis and ulcer of small intestine is inflammation or tissue defect in the small intestine of non-infectious origin, usually due to medication including chemotherapy or radiation therapy side effects; or allergic or systemic disorders. Its severity may vary from mild and inconvenient to severe and life-threatening.

**Inclusions:** - Noninfectious small intestinal inflammation, erosion, ulcer or ulcer scar

**Exclusions:** - Crohn disease of small intestine - Functional diarrhoea - Noninfectious neonatal diarrhoea