Duodenal stenosis from intramural cystic annular pancreas.

A case of annular pancreas presenting with duodenal obstruction due to overfilling of a large intramural duodenal cyst is reported. At 30 years of age, this man was an alcoholic with repeated attacks of pancreatitis which produced the enlargement of an annular pancreas and the development of a cyst probably through blocking of an aberrant duct. The surgical operation consisted of simply removing part of the external cyst wall and outer anterior layer of the duodenum. A postoperative acalculous cholecystitis necessitated subsequent cholecystectomy. Four years later, the patient had to be operated on for duodenal stenosis due to recurrent duodenal ulcers.