Preduodenal portal vein
The precise etiology is unknown, however, it is thought to occur due to incorrect formation of the foetal vitelline veins .
In approximately 50% of patients, PDPV was found incidentally through laparotomy or imaging for other reasons. If patients have symptoms, they are generally pediatric and present with symptoms of duodenal obstruction .
On CT with contrast, the main trunk of the portal vein is seen tracking anterior to the duodenum.
Treatment and prognosis
Treatment of PDPV induced duodenal obstruction is through bypass surgery, either with gastroduodenostomy or duodenoduodenostomy .