Iliac vein

Overview
In human anatomy, iliac vein refers to several anatomical structures located in the pelvis:
 * External iliac vein - terminates at the common iliac vein, drains the femoral vein.
 * Internal iliac vein - terminates at the common iliac vein, drains pelvic organs and perineum.
 * Common iliac vein - formed by the external and internal iliac veins, drains into the inferior vena cava.