Journal
AMERICAN JOURNAL OF HEMATOLOGY
Volume 83, Issue 5, Pages 420-423Publisher
WILEY-LISS
DOI: 10.1002/ajh.21128
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Patients with myeloproliferative disorders (MPD) are prone to develop thrombotic complications and thus frequently receive heparin. Surprisingly heparin-induced thrombocytopenia (HIT) has been rarely reported in MPD and is potentially under-diagnosed due to the relatively high platelet count. We report three patients with MPD who developed HIT; all presented with a relative fall of platelet counts (although without an absolute thrombocytopenia), thrombosis or skin necrosis and a positive test for HIT antibodies (particle gel immunoassay). Risk factors for developing HIT in our patients were exposure to unfractionated heparin, a recent surgical procedure and female gender. We review the literature on HIT in MPD and discuss the diagnosis of HIT in the absence of an absolute thrombocytopenia.
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