Eventually, compression from the proper popular iliac artery within the remaining prevalent iliac vein in opposition to the spine and pelvic brim is known to lead to iliofemoral deep venous thrombosis (Could–Thurner syndrome) in addition to the pelvic varices of PCS. This could weaken the vein wall leading to dilatation. https://sgvasculargrp.com/medical-condition/pelvic-congestion-syndrome/