Abstract
The off-label use of fondaparinux in patients with heparin-induced thrombocytopenia with thrombosis (HITT) has historically been controversial. We present a case of successful fondaparinux use to treat HITT confirmed by the serotonin-release assay in the setting of other significant clotting and bleeding risk factors. We report a 19-year-old male with a history of Factor V Leiden and recent neurosurgery treated with fondaparinux after developing HITT confirmed by the serotonin-release assay (SRA). The patient achieved full platelet recovery on fondaparinux and was successfully transitioned to warfarin therapy without further thrombotic nor bleeding complications. This case demonstrates a clear example of success of fondaparinux use to treat SRA-confirmed HITT in the setting of complicating factors and adds to the existing literature supporting the use of fondaparinux for HIT.
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