<prompt> Duval procedure in case of chronic pancreatitis involvesDistal resection of tail of pancreas with end to end pancteaticojejunostomyDistal resection of tail of pancreas with longitudinal opening of duct and pancteaticojejunostomyDuodenum preserving pancreatic head resectionLocal section of pancreatic head with longitudinal pancteaticojejunostomy  <response>: Surgical procedures in chronic pancreatitis Drainage procedure Duval procedure : Distal pancreatictomy with Roux-en-Y pancteaticojejunostomy caudal PJ Ref: Sabiston 20th edition Pgno : 1535 