Figure 2. Frey-type procedure: local excision of the pancreatic head overlying the ducts of Wirsung and Santorini and the uncinate, along with their tributary ducts, and decompressing the intrapancreatic portion of the common bile duct. Drainage is improved by opening the main pancreatic duct in the body and tail of the pancreas. The locally resected head and the opened main pancreatic duct in the body and tail are then drained into a Roux-en-Y limb of jejunum.