main portal fissure

main portal fissure

[TA]
the plane of the middle hepatic vein that separates the right and left (parts of the) liver; its position is estimated superficially by the Cantlie line, extrapolated from the notch for the gallbladder to the superior aspect of the groove for the vena cava on the diaphragmatic surface and the right sagittal fissure on the visceral surface.
References in periodicals archive ?
The branch for segment V (A05.8.01.047) (10 mm diameter) emerged from the left portal vein in 21 % of cases, it emerged from the right portal vein in 79 %; this segmental branch, after deepening 2 cm in its segmental parenchyma gave anterior, lateral, posterior and medial branches distributed between the right portal fissure (A05.8.01.036) and the main portal fissure (A05.8.01.035) from the lower border of the liver (A05.8.01.024) to the inferior vena cava from behind; the medial branches reached higher in the hepatic dome.
The plane of the umbilical fissure tilted 50 degrees to the left relative to the sagittal plane of the liver; the main portal fissure tilted 30 degrees to the left relative to the sagittal plane of the liver; the right portal fissure tilted 60 degrees to the right relative to the sagittal plane of the liver.
The segment V (yellow) limits ahead with the inferior border of the liver, behind the inferior vena cava, medially with the main portal fissure containing the intermediate hepatic vein and the medial edge of the segment IV, laterally with the right fissure containing the right hepatic veins and the medial edge of the segments VI and VII.