Preduodenal portal vein with preduodenal common bile duct: an extremely rare anomaly.

Preduodenal portal vein (PDPV) may occur as an isolated event and result in no symptoms, or it may found at autopsy as an incidental finding; associated preduodenal common bile duct (PDCBD) is an extremely rare event. To the 8 reported cases of PDPV with PDCBD, we add this rare case. Such a discovery is often incidental and of little import; however, it takes on major importance for hepatobiliary surgeons because the accidental damage of PDPV with PDCBD can lead to serious consequences. In addition to describing and illustrating this case, we discuss its relevant anatomy, embryology and associated malformations.