- Partial or complete circumferential encasement of 2nd part of the duodenum by a band of pancreatic tissue
- Prevalence: 3 per 20,000
- Aetiology: Migration anomaly – failure of the ventral bud to rotate
- Clinical: Most remain asymptomatic during lifetime
- Other possible symptoms:
- Duodenal constriction – non-bilious vomiting, bloating, feeding intolerance
- Pancreatitis