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DV Devine, MS Currie, WF Rosse and CS Greenberg
The Bernard-Soulier syndrome is an inherited bleeding disorder that is due
to a deficiency in platelet glycoprotein Ib. Bernard-Soulier platelets fail
to agglutinate in response to ristocetin despite normal levels of factor
VIII:von Willebrand factor. We report a patient who developed severe
refractory thrombocytopenia postsurgically while receiving procainamide
therapy. Thrombocytopenia was immune mediated since the patient's platelets
bore high levels of antiplatelet antibody. Radioimmunoprecipitation studies
demonstrated that the autoantibodies had specificity for platelet
glycoproteins Ib and V as well as platelet HLA. The patient's plasma as
well as purified immunoglobulin G completely inhibited the
ristocetin-induced aggregation of normal platelets but did not inhibit
adenosine diphosphate-induced aggregation. The laboratory studies revealed
that this patient suffered from antibody-mediated thrombocytopenia with
unusual characteristics that we have called pseudo-Bernard-Soulier
syndrome.
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| Copyright © 1987 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||