Annular pancreas

A ring or collar 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 from a malformation during development of the fetal pancreas. This condition may result in a narrowing of the duodenum from constriction 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. The incidence is approximately 1 out of 7000 people.

Signs and tests

  • polyhydramnios (excessive amniotic fluid during pregnancy)
  • pancreatitis
  • may be associated with Down Syndrome and other congenital gut anomalies
    • Tests include:
  • abdominal x-ray
  • barium enema
  • upper GI and small bowel series
  • abdominal ultrasound

    • Treatment

  • Surgical bypass of the obstructing segment of the
    • duodenum is the usual treatment for this disorder.

    Expectations (prognosis)

    There is a good prognosis with surgery.

    Complications

  • peptic ulcer
  • perforation (hole) of the intestine due to obstruction
  • peritonitis

    • Calling your health care provider

  • Call for an appointment with your health care provider if symptoms of annular pancreas are present.

    • Prevention

    Unknown.

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