*2.3.2.4 Type D*

Type D is a special group of variants that included 115 cases (15 15%). The various portal vein configurations identified were as follows. Among the common type, the portal vein divides into right and left branches and the right anterior portal vein branch is derived from the left portal vein (74 cases, 64 35%) (**Figure 6a**). The P6 portal vein is derived from the right anterior portal vein distal to the branching of the P7 portal vein from the right portal vein (19 cases, 16 52%) (**Figure 6b**). The portal vein trunk is trifurcation at the porta hepatis; it divides into the left, right anterior, and right posterior branches (8 cases, 6 96%) (**Figure 6c**). The right anterior portal vein is derived from the saccule of the left portal vein (4 cases, 3 48%) (**Figure 6d**). Approximately four to eight branches with similar thickness are derived from the right anterior portal vein supplying the right anterior liver (**Figure 6e**). The P2 and P3 branches share a common trunk (**Figure 6f**) that leads to several branches that supply liver segments II and III. The right anterior portal vein has a trunk that divides into several sector-shaped small branches.

The different types of liver segmentations in the different sexes are shown in **Table 1**. There was no difference between the sexes in terms of the different types of liver segmentation (χ<sup>2</sup> = 2.823, p = 0.420) (**Table 1**). Similarly, there was no difference between the pediatric (3 months to 15 years) and adult groups (>15 years) (χ<sup>2</sup> = 1.095 and p = 0.778) (**Table 2**).
