Figure 11d.  Pancreas divisum in a 62-year-old woman with recurrent pancreatitis. (a) MR cholangiopancreatogram demonstrates the distal bile duct (arrow) joining with the ventral pancreatic duct (arrowhead) to enter the major ampulla. (b) MR cholangiopancreatogram obtained 5 mm anterior to a shows the dorsal pancreatic duct (arrows), which is located anterior and superior to the ventral pancreatic duct (cf a). (c) Axial MR cholangiopancreatogram demonstrates the isolated ventral (arrow) and dorsal (arrowhead) pancreatic ducts. (d) Endoscopic retrograde cholangiopancreatogram obtained after injection of contrast material into the ventral duct (arrow) shows arborization of the duct. Residual contrast material from a prior injection at the minor ampulla is seen in the dorsal pancreatic duct (arrowheads).