annular pancreas is a rare developmental anomaly where the head of the pancreas surrounds the second part of the duodenum like a ring. this may cause the duodenal constriction, obstruction, peptic ulcers and other complications. we saw a classic case of annular pancreas. the head of pancreas surrounded the second part of duodenum completely. however there was no narrowing of the duodenum. the case may be of importance for gastroenterologists, surgeons and radiologists.