A case of annular pancreas in a male adult

Partial annular pancreas as an incidental finding in a patient with intermittent bowel obstruction: A case report

Complete annular pancreas (AP) is a congenital anomaly, in which the duodenum is either completely or partially encircled by the ring of pancreatic tissue, which eventually becomes continuous with the head of the pancreas. The incidence of AP is estimated to be around 0.02%. Reports from endoscopic retrograde cholangiopancreatography show an incidence of 0.4%. Partial AP (PAP) is a rarer entity, in which a band of pancreatic tissue in continuity with the head of the pancreas, incompletely encircles the duodenum. It may be asymptomatic or may present later in life with complications. We report a case of a 72-years old male with features of intermittent bowel obstruct which was later found to be having PAP on contrast-enhanced computed tomography imaging at the level of renal hilum characterized by "crocodile-jaw appearance." The possibility of PAP should also be considered at the back of mind of the treating physician, if a patient presents with a long-term history of postprandial abdominal discomfort.

Annular pancreas causing pyloric stenosis in a 66-year-old patient treated with gastrojejunostomy: a case report

Annular pancreas is defined by a ring of pancreatic tissue encircling the descending portion of the duodenum. It is exceptionally rare in adults and commonly diagnosed during the investigation of symptoms arising due to its complications. Treatment usually involves the surgical correction with a duodenoduodenostomy, gastrojejunostomy or duodenojejunostomy. We discuss the case of a 66-year-old male patient who presented with symptoms of gastric outlet obstruction and was found to have an annular pancreas encircling the pylorus and the first and second portions of the duodenum and was treated by performing a gastrojejunostomy. Upper gastrointestinal series, computerized tomography (CT) scans, and magnetic resonance cholangeopancreatographys can all be used for preoperative diagnosis; however, endoscopic retrograde cholangiopancreatography (ERCP) is the diagnostic modality of choice. Nonetheless, many patients may only be diagnosed intraoperatively, especially those who cannot undergo an ERCP due to stenosis proximal to the duodenum or patients in whom the annulus may not be visible on CT scan.