What function can a recanalized ligamentum teres serve?

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Recanalization of the ligamentum teres hepatis forms a venous collateral pathway. The ligamentum teres is the fibrous remnant of the fetal umbilical vein that runs in the falciform ligament from the umbilicus to the liver. When portal hypertension develops, this remnant can reopen to create a connection between the portal venous system (via paraumbilical veins near the left portal area) and systemic abdominal veins around the umbilicus. This provides an alternate route for blood to bypass the congested liver, acting as a porto-systemic venous collateral. That’s why its function in this context is as a venous collateral. It does not serve as an arterial supply route, a biliary conduit, or a lymphatic drainage pathway.