[Significance of umbilical and paraumbilical veins as collaterals in portal hypertension].
Twenty-one postmortem specimens of the liver (18 normal livers, 3 liver metastases) with attached ligamentum teres were investigated using silicone rubber injection technique. In all cases, the paraumbilical veins were demonstrated. They were usually divided into 2 groups, one on the right and the other on the left side of the ligamentum teres, and they terminated in a variable manner into small peripheral portal vein branches in the liver parenchyma. A patent proximal segment of the umbilical vein was found in 7 of the 21 cases. Connections between the umbilical vein and paraumbilical veins were supposed to represent one of the collateral channels in portal hypertension.
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D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003097:Collateral Circulation; D006801:Humans; D006975:Hypertension, Portal / Q000000981:diagnostic imaging / Q000473:pathology* / Q000503:physiopathology; D008875:Middle Aged; D011172:Portography; D012189:Retrospective Studies; D014471:Umbilical Veins / Q000002:abnormalities / Q000000981:diagnostic imaging / Q000473:pathology*