Abstract
The objective of this study was to analyze the caudate portal branches and their relationships with the hepatic caudate veins and propose a new nomenclature for the caudate branches based on their territory of distribution. We realized the fine dissection of the veins of the caudate lobe in 40 human livers fixed and preserved in formalin. In 15/40 (37.5%) cases there was a single branch to the caudate lobe. In 25/40 (62.5%) cases there was more than one branch, with a posterior caudate branch in 20/40 (50%) cases, an anterior caudate branch in 15/40 (37.5%) cases, a left caudate branch in 14/40 (35%) cases, and a right caudate branch in 8/40 (20%) cases. The most frequent combination detected (11/40, 27.5% of cases) was that of the posterior and anterior branches. The venous drainage of the caudate lobe and its papillary process was provided by the superior caudate hepatic vein in 23/40 (57.5%) cases, by the middle caudate vein in 35/40 (87.5%) cases (which was the only vein in 12/35 cases), and by the inferior caudate vein in 16/40 (40%) cases. In 11/40 (12.5%) cases there were accessory caudate veins, which emptied into the left and intermediate hepatic veins. The portal branches and the hepatic veins related to the caudate process were studied. In conclusion, the new nomenclature analyzes more precisely the distribution of the caudate portal branches.
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