“…The true prevalence of thrombophilia in patients with IVC anomalies is unknown [17] . As mentioned above, the pelvic and lower extremity DVT risk is elevated (10-fold increase) due to often insufficiently developed collateral pathways, leading to inadequate venous return, venous hypertension, and venous stasis [6 , 15 , 18] . About 5% of people under 30 with DVT have this condition [5 , 8 , 9 , 14 , 19] .…”