Fig. 6
From: Prepancreatic postduodenal portal vein: a case report and review of the literature
Development of the preduodenal portal vein. In the preduodenal variant, the middle anastomosis involutes and the caudal anastomosis forms the portal vein. The ventral pancreas rotates in a counter clockwise direction to fuse with the dorsal pancreatic bud. This results in a portal vein anterior to the duodenum. C1 caudal anastomosis, C2 cranial anastomosis, D duodenum, DP dorsal pancreatic bud, LPV left portal vein, LVV left vitelline vein, M middle anastomosis, P pancreas, PV portal vein, RVV right vitelline vein, VP ventral pancreatic bud