Double inferior vena cava filter implantation in a patient with duplication of the inferior vena cava.

An 84-year-old-woman was admitted because of syncope and dyspnea. She also required surgery for lumbar disc herniation. Computed tomography revealed bilateral massive pulmonary thromboembolism, deep vein thrombosis, and duplication of the inferior vena cava (IVC) in which the left IVC had merged with the left renal vein. Two retrievable IVC filters were deployed in both IVCs, and direct oral anticoagulant therapy was started. After orthopedic surgery for the lumbar disc herniation, the IVC filters were retrieved. No complications occurred. Different treatment strategies could be required for IVC filter implantation in a patient with duplication of the IVC.