Hepatovenous Segment IX (Pars hepatovenosa segmenti IX)
Educational content only — not medical advice.
Anatomy
Hepatovenous segment IX (caudate process subsegment) is the functional paracaval portion of the liver situated between the inferior vena cava and the main hepatic parenchyma, draining directly into the retrohepatic inferior vena cava via small, independent short hepatic veins.
Clinical notes
In Budd-Chiari syndrome (thrombosis of main hepatic veins), segment IX is characteristically spared due to its independent caval tributaries, undergoing marked compensatory hypertrophy.
Related structures
Educational references
FAQ
What is the role of the Hepatovenous Segment IX?
Hepatovenous segment IX (caudate process subsegment) is the functional paracaval portion of the liver situated between the inferior vena cava and the main hepatic parenchyma, draining directly into the retrohepatic inferior vena cava via small, independent short hepatic veins.
Why is the Hepatovenous Segment IX clinically important?
In Budd-Chiari syndrome (thrombosis of main hepatic veins), segment IX is characteristically spared due to its independent caval tributaries, undergoing marked compensatory hypertrophy.
Source & license
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