Primary nonspecific ulceration of small intestine

**Definition:** Primary or simple ulcer of the small intestine occurring beyond the duodenum is rare. The lesion includes single ulcers within the jejunum and ileum of unknown etiology. Non-specific ulcer accompanied with Behcet disease is classified elsewhere.

**Inclusions:** - Simple ulcer of small intestine

**Exclusions:** - Ulcer in Behcet disease