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Figure 3. Diagrams show normal and abnormal variants of ductal anatomy. In a normal variant (A), the main pancreatic duct drains via the major papilla, and a patent accessory duct drains via the minor papilla. In the first abnormal variant (B), the accessory duct is not patent at the minor papilla. In incomplete pancreas divisum (C), a filamentous ductal branch connects the ventral and dorsal pancreas. In another variant of pancreas divisum (D), the entire pancreatic ductal system drains via the minor papilla. In typical pancreas divisum (E), a small ventral duct drains half of the pancreas via the major papilla, and a large dorsal duct drains the other half via the minor papilla. In reversed pancreas divisum (F), the accessory ductal system drains a small portion of pancreatic parenchyma via the minor papilla, and the main pancreatic duct drains the major part of the pancreas via the major papilla. (Reproduced with permission from the Office of Visual Media, Indiana University School of Medicine.)
