A rare congenital abnormality in which the duodenum is surrounded by a ring of pancreatic tissue. it may result in constriction of the duodenum and feeding intolerance.

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...