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A-D. A 24-year-old man with right-extremity DVT developed extensive IVC thrombosis after insertion of a filter. A. Venogram revealed extensive thrombosis within the IVC and iliac vein (black arrow). B. A second filter was placed above the first filter (white arrow). C. Follow-up venogram revealed grade II resolution of thrombus. Minor residual thrombus was noted (black arrow). D. The filters were retrieved successfully.
