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Case 4: Bilateral lower limb swelling of 30 days’ duration, 11 months after filter implantation. (A) Occlusion of the infrarenal IVC and OptEase filter in the thrombus were displayed by cavogram. (B) After 14 days of thrombolytic therapy, the residual thrombus in the IVC was >50% and the bilateral lower limb swelling was relieved significantly. IVC, inferior vena cava.
