Annular Pancreas

Definition

Definition of Annular Pancreas
Annular pancreas is a rare condition in which the second part of the duodenum is surrounded by a ring of pancreatic tissue continuous with the head of the pancreas. This portion of the pancreas can constrict the duodenum and block or impair the flow of food to the rest of the intestines. It is estimated to occur in 1 out of 12,000 to 15,000 newborns. The ambiguity arises from the fact that not all cases are symptomatic.

Symptoms

Symptoms of Annular Pancreas
Early signs of abnormality include polyhydramnios (an excess of amniotic fluid), low birth weight, and feeding intolerance immediately after birth.

Causes

Causes of Annular Pancreas
It is typically associated with abnormal embryological development, however adult cases can develop. It can result from growth of a bifid ventral pancreatic bud around the duodenum, where the parts of the bifid ventral bud fuse with the dorsal bud, forming a pancreatic ring. It can also result if the ventral pancreatic bud fails to fully rotate, so it remains on the right or if the dorsal bud rotates in the wrong direction, such that the duodenum is surrounded by pancreatic tissue. Blockage of the duodenum develops if inflammation (pancreatitis) develops in the anular pancreas.

Diagnosis

Diagnosis of Annular Pancreas
Postnatal diagnostic procedures include abdominal x-ray and ultrasound, CT scan, and upper GI and small bowel series.

Treatment

Treatment of Annular Pancreas
Treatment usually is bypassing the obstructed segment of dudenum by duodeno-duodenostomy. Another approach is laparoscopic gastrojejunostomy.

Prognosis

Prognosis of Annular Pancreas
The outcome is usually good with surgery.

Prevention

Prevention of Annular Pancreas
Consult with your doctor.