Hepatic segment: A study from a vascular architectural point of view.

概要

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One hundred human autopsy livers were injected with polymerized meta-acrylate (30 cases)or silicone rubber(70 cases)into the hepatic hollow systems(portal vein, hepatic artery, bile duct, and hepatic vein). Corrosion casts of the vasculatures were prepared for keeping in situ form of the liver as much as possible.<BR>Branching patterns of the portal vein and concomitantly other vascular systems were throughly scrutinized in order to determine the hepatic segments. All materials examined were able to unexceptionally divided into five segments(lateral, medial, anterior, and posterior segments, and the caudate lobe), and the results obtained was principally identical to the hepatic segments described in the Japanese general rules for the study of primary liver cancer, Each segments could be separated into two subsegments except for the caudate lobe.<BR>The intersegmental lines were corresponded to directions of the main hepatic veins and the boundary planes, which were not a simple straight plane and were complicated rugged one, were located on the diaphragmatic surface of the liver and converged to the hepatic hilum. The intersubsegmental lines were more irregular than those of the intersegmental one. Actual patterns of the intersegmental and intersubsegmental lines were reported.
社団法人日本肝臓学会の論文