That is an invasive test of pelvic venography. In which Physicians inject a distinction dye into the veins to visualize any blockages or other abnormalities from the pelvic veins. For that reason, venography could be the gold regular for diagnosing PCS. This will weaken the vein wall resulting in dilatation. https://sgvasculargrp.com/medical-condition/pelvic-congestion-syndrome/