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For further information, see CMDT 14-06: Congenital Disorders of Platelet Function

Key Features

  • Results from an abnormality in the platelet glycoprotein IIb/IIIa receptor on the platelet membrane

  • Glycoprotein IIb/IIIa is the fibrinogen receptor critical for linking platelets during initial platelet aggregation/platelet plug formation

  • Inheritance is autosomal recessive

Clinical Findings

  • Onset of bleeding is usually in infancy or childhood

  • Degree of deficiency in IIb/IIIa may not correlate well with bleeding symptoms

  • Bleeding

    • Mucosal (epistaxis, gingival)

    • Menorrhagia

    • Postoperative

    • Variable severity but may be severe

Diagnosis

  • Platelet aggregation studies show marked impairment of aggregation in response to stimulation with various agonists

Treatment

  • Platelet transfusions when necessary

  • Desmopressin acetate (DDAVP), antifibrinolytic agents, and recombinant human activated factor VII also have been used successfully

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