Anatomy and embryology of pancreas divisum

The pancreas develops from 2 parts whose ducts are in continuity with the common bile duct. One part is ventral and the other dorsal to the intestinal tract before rotation. The rotation brings the 2 parts together with separate ducts. The duct of the dorsal (larger) part later becomes continuous and enters that of the ventral part, which enters the duodenum with the common bile duct. However, in a congenital malformation (pancreas divisum), the other 2 parts of the pancreas remain distinct, each with its own duct.