Health Encyclopedia

Annular pancreas

Definition

An annular pancreas is a ring of pancreatic tissue that abnormally encircles the duodenum (the part of the small intestine that connects to stomach).

Causes, incidence, and risk factors

Annular pancreas is thought to be caused by a malformation during the development of the pancreas, before birth. This condition may result in a narrowing of the duodenum due to squeezing by the ring of pancreas.

Complete obstruction of the duodenum is often seen in newborns with this condition. However, half of the cases occur in adults. There are probably many cases that go undetected due to mild symptoms.

There is an increased incidence of peptic ulcer associated with this condition. Annular pancreas affects approximately 1 in 7,000 people.

Symptoms

Fullness after eating
Nausea and Vomiting
Feeding intolerance in newborns

Signs and tests

Signs that may indicate annular pancreas include the following:

Polyhydramnios (excessive amniotic fluid during pregnancy)
Pancreatitis
Down syndrome
Other congenital gut anomalies

Tests include:

Treatment

Surgical bypass of the blocked part of the duodenum is the usual treatment for this disorder.

Expectations (prognosis)

There is a good prognosis with surgery.

Complications

Peptic ulcer
Perforation (tearing) of the intestine due to obstruction
Peritonitis
Pancreatitis (inflammation of the pancreas)
Obstructive jaundice

Calling your health care provider

Call for an appointment with your health care provider if you or your child develop any symptoms of annular pancreas.

Review Date:10/13/2006
Reviewed By:Jenifer K. Lehrer, MD, Department of Gastroenterology, Frankford-Torresdale Hospital, Jefferson Health System, Philadelphia, PA. Review provided by VeriMed Healthcare Network.

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