iliac veins
Iliac vein. The iliac vein is the origin of most IVC collaterals, and its involvement in the thrombotic process invariably leads to symptom production. From: Endovascular Surgery (Fourth Edition), 2011. Related terms: Inferior vena cava; Anastomosis; Graft (surgery) Pelvis; Iliac artery; Femoral vein; Bladder; Ureter; Fascia; Vessel