vitelline vein


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vitelline vein

[vī′tel‚ēn ′vān]
(embryology)
Any of the embryonic veins in vertebrates uniting the yolk sac and the sinus venosus; their proximal fused ends form the portal vein. Also known as omphalomesenteric vein.
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References in periodicals archive ?
The superior and the inferior anastomosis atrophy, followed by the proximal part of the left and the distal parts of the right vitelline vein. This leaves the anastomic network around the duodenum with one vessel, the portal vein.
Under normal circumstances, the prerenal division of the IVC is formed following the union of the hepatic segment, which itself is a vitelline vein derivative, with the right subcardinal vein.
(1) It is an early embryological vascular accident, due to the persistence of the caudal anastomosis of the vitelline vein. PDPV is rarely an isolated incident associated with Situs inversus or heterotaxia or with associated cardiac anomalies, asplenia or poly splenia, biliary atresia, duodenal atresia, malrotation.