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Normal Anatomy

Retroduodenal artery

also known as the posterior superior pancreaticoduodenal artery, first branch of the gastroduodenal artery. Arises 1 - 2 cm from the latter's origin above the duodenum and pancreatic head and gives rise to the blood supply to the common duct. It descends along the left side of the common bile duct, crosses its supraduodenal portion anteriorly (occasionally posteriorly), and then runs along its right side. At about the middle portion of the posterior surface of the pancreatic head it anastomoses with the posterior inferior pancreaticoduodenal artery and gives rise to the supraduodenal artery of Wilkie in 50% of individuals. See blood vessels, pancreas (II), Fig. 1, blood vessels, pancreas (II), Fig. 2, blood vessels, small intestine (II), Fig. 1, blood vessels, small intestine (II), Fig. 3

JJ