Annular pancreas

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[edit] Discussion of Annular pancreas

  • Rare anomaly (1/20,000 people).
  • Band of pancreatic tissue surrounds the descending duodenum, either partially or completely, and is in continuity with the head of the pancreas.
  • Accepted theory is that the ventral pancreatic anlage is responsible for the anomaly by dividing early into two segments.


  • The anomaly may be discovered incidentally in asymptomatic patients.
  • In others, annular pancreas is associated with duodenal stenosis, postbulbar ulcerations, pancreatitis, or biliary obstruction.
  • Surgical resection is recommended for symptomatic cases.

[edit] Imaging Findings for Annular pancreas

  • ERCP: An aberrant pancreatic duct communicating with the main pancreatic duct and encircling the duodenum.
  • CT or MR images may show normal pancreatic tissue, with or without a small pancreatic duct, encircling the duodenum.
  • Upper GI serier: Narrowing of the second portion of the duodenum.

[edit] Images

Patient #1

[edit] See Also

[edit] External Links

[edit] References for Annular pancreas