Abstract
Ethylenediaminetetraacetic acid (EDTA)-dependent pseudothrombocytopenia is the phenomenon of a spurious low platelet count due to antiplatelet antibodies that cause platelet clumping in blood anticoagulated with EDTA. The aggregation of platelets in EDTA-dependent pseudothrombocytopenia is usually prevented by other anticoagulants, such as sodium citrate. EDTA-dependent pseudothrombocytopenia has never been associated with hemorrhagic diathesis or platelet dysfunction. In this article, a 2,5-year-old boy with EDTA-dependent pseudothrombocytopenia is presented because of rare presentation. We report that EDTA can induce platelet clumping, and thus spuriously low platelet counts. However, aggregation of platelets was not detected in blood samples with sodium citrate, and platelet count was normal.
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