Duplicated inferior vena cava (DIVC) is a rare anomaly of the venous system, which is mostly found accidentally during intra-abdominal surgery and radiographic study. This anomaly is asymptomatic but may be related to venous thromboembolism in some patients. We present a case of a patient who had inadequate drainage for extracorporeal membrane oxygenation, which was found to be related to duplicated inferior vena cava.
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