Preduodenal portal vein
Preduodenal portal vein (PDPV) is a rare congenital vascular disorder resulting in the portal vein main trunk passing anteriorly to the duodenum 1.
The precise etiology is unknown, however it occurs due to incorrect formation of the foetal vitelline veins 2.
- Situs inversus
- Biliary atresia
- Duodenal atresia
- Annular pancreas
In approximately 50% of patients, PDPV was found incidentally through laparotomy or imaging for other reasons 4.
If patients have symptoms, they are generally pediatric and present with symptoms of duodenal obstruction 4.
CT with contrast: will show the main truck of the portal vein tracking anterior to the duodenum.
Treatment of PDPV induced duodenal obstruction is through bypass surgery, either with gastroduodenostomy or duodenoduodenostomy 5.