Table 1 Previous reports of prepancreatic postduodenal portal vein

1

1972

Brook [8]

84

F

GB stone

Cholecystectomy

N.M

N.M

N.M.

N.M

N.M.

2

1983

Matsmoto [6]

64

M

Bile duct ca

PD

Reverse L-shaped form

Ventral to CBD

N.M.

+ 

–

3

1995

Matsui [9]

66

F

Bile duct ca

PD

L-shaped form

Ventral to CBD

Early bifurcation of left and right PV

+ 

N.M.

4

1998

Yasui [10]

65

M

Cecal ca

Rt. Hemicolectomy

L-shaped form

Ventral to CBD

Early bifurcation of left and right PV

Unclear

N.M.

5

1999

Ozeki [11]

62

F

Liver meta

Rt. hepatectomy

L-shaped form

Ventral to CBD

Early origin of P4 and right PV, P2 + 3 originated from P8

+ 

–

6

2000

Tanaka [12]

61

M

Bile duct ca

PD

Normal form

Parallel to CBD

N.M.

−

–

7

2003

Inoue [13]

50

M

Gastric ca

Total gastrectomy

L-shaped form

Ventral to CBD

N.M.

N.M.

–

8

2005

Jung [14]

28

F

Adenomyomatosis of GB

LC

Omega or arc-shaped form

N.M

N.M.

N.M.

–

9

2010

Tomizawa [7]

74

M

Liver meta

N.M

L-shaped form

Ventral to CBD

N.M.

N.M.

N.M.

10

2010

Tomizawa [7]

74

F

Breast ca

N.M

Normal form

Ventral to CBD

N.M.

N.M.

N.M.

11

2013

Jain [15]

56

F

Hepatitis

None

L-shaped form

Ventral to CBD

N.M.

N.M.

N.M.

12

2014

Shimizu [16]

85

F

Ampullary ca

PD

L-shaped form

Ventral to CBD

Early origin of P5

+ 

Massive bleeding during surgery, PVT (C-DII), ascites (C-DII)

13

2017

Goussous [17]

55

F

Choledocholithiasis

None

N.M

Parallel to CBD

N.M.

N.M.

N.M.

14

2020

Higashihara [18]

73

M

Ampullary ca

PD

L-shaped form

Ventral to CBD

Cavernous transformation

+ 

Massive bleeding during surgery, PVT (C-DII), DGE (C-DII)

15

2023

Present case

63

M

Hepatocellular carcinoma

Liver partial resection

L-shaped form

Ventral to CBD

Porto-portal communications

Unclear

–