Ultimately, compression from the correct popular iliac artery within the left widespread iliac vein towards the backbone and pelvic brim is understood to result in iliofemoral deep venous thrombosis (May–Thurner syndrome) and also the pelvic varices of PCS. As pointed out above, dihydroergotamine can also be reported from the literature https://sgvasculargrp.com/medical-condition/pelvic-congestion-syndrome/