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[Gray platelet syndrome].

P Lutz1, A Roth-Pougheon, M L Wiesel

  • 1Service de Pédiatrie 4 (Unité d'Hémato-Oncologie Pédiatrique), INSERM U 311, Strasbourg.

Archives Francaises De Pediatrie
|August 1, 1992
PubMed
Summary
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Gray platelet syndrome, a rare inherited disorder, involves absent platelet alpha-granules. This condition may be underdiagnosed in thrombocytopenia cases, highlighting the need for careful blood smear examination.

Area of Science:

  • Hematology
  • Inherited disorders
  • Platelet biology

Background:

  • Gray platelet syndrome is a rare inherited disorder.
  • Characterized by reduced or absent platelet alpha-granules and associated proteins.

Observation:

  • A 4-year-old boy presented with ecchymoses and thrombocytopenia.
  • Initial diagnosis of idiopathic thrombocytopenia purpura was made.
  • Persistent thrombocytopenia led to further investigation revealing gray platelets, prolonged bleeding time, and absent alpha-granules on electron microscopy.

Findings:

  • Platelet aggregation and adhesion were normal.
  • Stimulated platelets failed to release platelet factor 4 and beta-thromboglobulin.
  • Elevated plasma levels of beta-thromboglobulin were observed.

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Implications:

  • Gray platelet syndrome may be underdiagnosed in patients with thrombocytopenia.
  • Platelet-specific proteins are synthesized but not stored due to alpha-granule deficiency.
  • This deficiency can lead to increased plasma levels of these proteins.