肝小葉紋理に対する基礎的研究

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タイトル別名
  • A Basic Study on Hepatic Lobular Markings.

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To analyse thoroughly the peritoneoscopic pictures of the surface of the liver, it is necessary to understand its fine anatomy, or in other words, to know precisely the course and distribution of portal venous system. Finest branch of portal venous system is named as terminal portal venule (TPV), which usually end in the liver capsule and can be observed peritoneoscopically in combination with surrounding connective tissue as a grayish small spot of 0.1-0.3 mm in diameter. Classical hepatic lobule is circumscribed by these grayish small spots, descrived above. Hepatic lobular markings were observed in 86 out of 110 cases (78.1%) under magnifying peritoneoscope and mutual distances between grayish small spots were 0.2-2.0 (mean±SD, 0.76±0.25) mm. Histological reconstruction study on liver blocks obtained at autopsy or surgical resection revealed that almost all portal veins running f oward the liver surface connect with TPVs of the liver capsule in 4 cases, and end in the hepatic parenchyma in only 1 case. The mutual distances between superficial spots of TPV were 0.2-1.7 (mean±SD, 0.85±0.35) mm, which were compatible with mutual distances between grayish small spots observed at peritoneoscopy.

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