Abstract
The pancreas develops from two separate anlagen, which arise as diverticula off the caudal end of the foregut during the 4th week of development (Fig. 3.1). The dorsal anlage or dorsal bud is the most cranial one and arises between the leaves of the dorsal mesogastrium (Langman 1975). The ventral component arises at the basis of the hepatic diverticulum and is initially composed of separate right and left lobes. The left lobe usually regresses completely. During further development, the ventral pancreas rotates clockwise around the duodenum to come to lie to the right of the dorsal pancreas. During the 7th week, the two pancreatic components fuse. The dorsal pancreas becomes the tail, body, and portions of the head of the pancreas. The ventral pancreas becomes the remainder of the head. Classic descriptions state that the cephalad portion of the head of the pancreas is derived from the dorsal pancreas, while the caudal portion is derived from the ventral pancreas (Kleitsch 1955).
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Van Hoe, L., Claikens, B. (1999). The Pancreas: Normal Radiological Anatomy and Variants. In: Baert, A.L., Delorme, G., Van Hoe, L. (eds) Radiology of the Pancreas. Medical Radiology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-58380-3_3
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