Fig. 4.

Schematic illustration of the pancreatic duct of normal cases with the long-type and short-type accessory pancreatic duct, complete pancreas divisum, incomplete pancreas divisum (Type 1–3), and pancreaticobiliary maljunction showing the portions whose length and diameter were measured. a, the entire length of the accessory pancreatic duct; b, length of the accessory pancreatic duct from orifice to the first long inferior branch; c, the entire length of the main (ventral) pancreatic duct from orifice to junction with the accessory pancreatic duct; d, length of the main (ventral) pancreatic duct from orifice to the long inferior branch; e, length of the main pancreatic duct from orifice to junction with the communicating branch in Type 2 and 3; x, maximum diameter of the accessory (dorsal) pancreatic duct; y, maximum diameter of the main (ventral) pancreatic duct; z, maximum diameter of the main pancreatic duct at junction with the accessory pancreatic duct in Type 1, and maximum diameter of the communicating branch in Types 2 and 3; f, length of the common channel in pancreaticobiliary maljunction; g, length of the main pancreatic duct from the proximal portion of the common channel to the inferior branch in pancreaticobiliary maljunction; h, length of the main pancreatic duct from the inferior branch to the junction with the accessory pancreatic duct.