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  • Title: A case of gray platelet syndrome masked by immune thrombocytopenia at presentation.
    Author: Mizuno N, Kanamori E, Saito H, Murakami N, Tojo N, Tohda S.
    Journal: Acta Haematol; 2014; 132(2):163-5. PubMed ID: 24577417.
    Abstract:
    We report a case of gray platelet syndrome (GPS) associated with immune thrombocytopenia (ITP) at presentation. A 22-year-old male patient presenting with petechiae on his limbs was diagnosed with ITP due to a gradual decrease of his platelet count to a minimum of 26 × 10(9) /liter and an elevated platelet-associated IgG (PA-IgG) level in the absence of any other specific cause of thrombocytopenia. Administration of prednisolone increased his platelet count, but this dropped again to approximately 50 × 10(9) /liter as the dose was tapered, and remained at the same level after the treatment was terminated. Thirteen years later, we reassessed the cause of the thrombocytopenia because the PA-IgG level was found to be within the normal range. There were large hypogranular platelets on the blood film and a deficit of α-granules in the platelets on electron microscopy. On this basis, we diagnosed his thrombocytopenia as GPS. To our knowledge, this is the first report of a GPS case associated with ITP at presentation. This case illustrates the importance of carefully reviewing blood film results in the differential diagnosis of thrombocytopenia.
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