Annular pancreas
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Presentation
Abdominal pain
Patient Data
Pancreatic tissue encircles the second part of the duodenum. The rest of the pancreas appears normal, and the pancreatic duct is not dilated. No peripancreatic nodule or mass is identified. Findings are consistent with a complete annular pancreas.
Case Discussion
This case demonstrates the typical appearance of an annular pancreas, a morphological anomaly in which pancreatic tissue encircles the duodenum. The condition is divided into:
complete annular pancreas: pancreatic parenchyma or an annular duct is seen to surround the 2nd part of the duodenum completely
incomplete annular pancreas: the annulus does not completely surround the duodenum, giving a 'crocodile jaw' appearance
Associated duodenal narrowing and dilatation of the proximal duodenum may also be seen. In adults, it is frequently associated with pancreatitis.
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