Which structure forms the posterior border of the caudate lobe?

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The caudate lobe sits on the posterior surface of the liver, and its back edge runs directly against the inferior vena cava. This large vein lies behind the liver and receives hepatic veins draining from the caudate lobe, defining its posterior boundary. The ligamentum venosum marks a superior-left boundary toward the left lobe, not the posterior edge. The portal vein and hepatic artery are part of the porta hepatis and do not form the caudate lobe’s posterior border. Therefore, the inferior vena cava forms the posterior border.