Figure 2

Preoperative 3D volume rendering image in the anterior view. A large aneurysm from the lower part of the abdominal aorta to the right CIA is observed. There is stenosis of the IVC due to displacement of AAA. The fistulous venous return to the IVC runs via the peripheral dilated veins in the bilateral internal iliac veins, dilated left and right ovarian veins, and left renal vein.