PMC6964327_01
A) Contrast-enhanced computed tomography (CECT) axial scan shows compression of left common iliac vein (red arrow) between right common iliac artery (black arrow) and vertebral body. B) CECT axial and C) coronal scans show venous collaterals (black arrow) in the pelvis posterior to pubic symphysis (axial scan) and inferior to urinary bladder (coronal scan)
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Prominent collateral vessels were seen arising from the right internal iliac vein and supplying the left internal iliac and CIV (Figure 1).