The operation of choice for the below condition

The treatment of annular pancreas is duodenojejunostomy or gastrojejunostomy either of which bypasses the obstruction. According to Bailey and Love duodenoduodenostomy or duodenojejunostomy are usual operation. Obstructing pancreatic ring must not be simply divided. Since this may not relieve the obstruction and pancreatic fistula may result. Annular pancreas is formed by a thin band of normal pancreas tissue that completely encircles the second portion of duodenum and is continuous with head of pancreas anteriorly and posteriorly. 40% patients have associated duodenal stenosis or atresia. Symptoms of duodenal obstruction (gastric distention and vomiting) occur in about one third of cases in the first week of life and about one half of cases in the first year. Rests are asymptomatic until adulthood, when abdominal pain, nausea and vomiting may occur.