Vein length and diameter after dilatation were recorded. Cross-sections of 15 recanalized umbilical veins were processed by routine histologic examination and stained with hematoxylin and eosin ...
Thrombosis completely recanalized and resolved after 3-6 weeks in three survived neonates. There was history of exchange transfusion for hyperbilirubinemia via umbilical vein in two neonates with PVT.
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