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Prevalence and Types of Main and Right Portal Vein Branching Variations on MDCT

Çetin Atasoy1 and Elif Özyürek1

1 Both authors: Department of Radiology, Ankara University Medical School, Ibn-i Sina Hospital, Sihhiye 06100, Ankara, Turkey.


Figure 1
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  		Fig. 1 —34-year-old man with type 1 main portal vein (MPV) anatomy. Maximum-intensity-projection image, oblique coronal view, shows MPV bifurcating into left portal vein (LPV) and right portal vein (RPV), which later divides into right anterior portal vein (RAPV) and right posterior portal vein (RPPV).

 

Figure 2
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  		Fig. 2A —58-year-old man with type 2 main portal vein (MPV) anatomy. Volume-rendered image, left superior view, shows MPV dividing into left portal vein (LPV), right anterior portal vein (RAPV), and right posterior portal vein (RPPV).

 

Figure 3
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  		Fig. 2B —58-year-old man with type 2 main portal vein (MPV) anatomy. Axial image shows proximal parts of three veins at level of trifurcation.

 

Figure 4
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  		Fig. 3A —45-year-old woman with type 3 main portal vein (MPV) anatomy. Volume-rendered image, anteroinferior view, shows MPV bifurcating into right posterior portal vein (RPPV) and common trunk (RAPV-LPV) that gives rise to left portal vein (LPV) and right anterior portal vein (RAPV).

 

Figure 5
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  		Fig. 3B —45-year-old woman with type 3 main portal vein (MPV) anatomy. Axial image shows RPPV as first branch of MPV.

 

Figure 6
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  		Fig. 3C —45-year-old woman with type 3 main portal vein (MPV) anatomy. Section more craniad than B shows proximal parts of RAPV and LPV just beyond bifurcation of common trunk.

 

Figure 7
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  		Fig. 4 —49-year-old man with conventional right portal vein (RPV) branching. Volume-rendered image, posterosuperior view, shows RPV bifurcating into right anterior portal vein (RAPV) and right posterior portal vein (RPPV). MPV = main portal vein, LPV = left portal vein.

 

Figure 8
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  		Fig. 5 —16-year-old girl with trifurcation of right portal vein (RPV). Volume-rendered image, superior view, shows RPV trifurcating into right anterior portal vein (RAPV), segment VII vein (SVII vein), and segment VI vein (SVI vein). MPV = main portal vein, LPV = left portal vein.

 

Figure 9
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  		Fig. 6A —70-year-old woman with abnormally proximal origin of segment VII vein (SVII vein). Volume-rendered image, superior view, shows SVII vein originating from right portal vein (RPV) proximal to its bifurcation into right anterior portal vein (RAPV) and segment VI vein. MPV = main portal vein, LPV = left portal vein, RAPV = right anterior portal vein, SVI vein = segment VI vein.

 

Figure 10
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  		Fig. 6B —70-year-old woman with abnormally proximal origin of segment VII vein (SVII vein). Axial images show abnormally proximal origin of SVII vein from RPV. B shows distal part of SVII vein supplying posterosuperior part of right lobe. C shows origin of SVII vein from right portal vein.

 

Figure 11
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  		Fig. 6C —70-year-old woman with abnormally proximal origin of segment VII vein (SVII vein). Axial images show abnormally proximal origin of SVII vein from RPV. B shows distal part of SVII vein supplying posterosuperior part of right lobe. C shows origin of SVII vein from right portal vein.

 

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