Which of the following veins is not a part of the pelvic anatomy mentioned?

The inferior iliac vein is not typically recognized as a distinct anatomical structure within the pelvic anatomy. Instead, the more common terms related to the iliac veins are the internal iliac vein and the external iliac vein, which drain blood from the pelvis and lower limbs, respectively. The inferior iliac vein may sometimes be referred to in a broader sense, but it does not denote a widely accepted anatomical vein within standard pelvic anatomy references.

On the other hand, the pudendal vein is known for draining the structures of the perineum and is significant in the anatomy of the pelvis. The hemorrhoidal vein pertains to the venous drainage associated with the rectal area, and variations of this vein are often discussed in relation to conditions such as hemorrhoids. The common femoral vein is involved in the venous return from the leg and does have anatomical significance that extends into the pelvic region. Thus, the distinction of the inferior iliac vein makes it the outlier in this context.