Inferior Vena Cava Filter Occlusion Causing Phlegmasia Alba Dolens

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Phlegmasia alba dolens is a rare sequela of acute extensive venothrombus of the iliofemoral segments. Rarely, phlegmasia alba dolens can also result from clotted inferior vena cava filter. A 39-year-old with protein S deficiency, and prior inferior vena cava filter placement after remote trauma presented to the emergency department with progressive bilateral lower extremity pain and swelling. Venous duplex revealed extensive bilateral deep vein thromboses from the external iliac veins to popliteal veins, as well as thrombophlebitis of the left great saphenous vein. Venography confirmed patency of the suprarenal vena cava with abrupt occlusion of the infrarenal segment at the level of the inferior vena cava filter. The filter was removed followed by endovascular thrombectomy and adjunctive venoplasty. The patient progressed well and discharged on therapeutic anticoagulation. This case illustrates that a staged endovascular approach may be utilized for acute on chronic caval thrombosis and filter removal.

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