Transient EDTA-Dependent Pseudothrombocytopenia Phenomenon in a Patient with Antiphospholipid Syndrome.

Antiphospholipid syndrome (APS) is an autoimmune disorder associated with arterial/venous thrombosis and pregnancy loss; thrombocytopenia is another common manifestation of APS. In the present study, we discovered a transient ethylenediaminetetraacetic acid-dependent pseudothrombocytopenia (EDTA-PTCP) phenomenon in APS, which has not yet been reported in the literature.