PMC6754873_01
Platelet aggregation test by LTA at the time diagnosis. (a) Platelet aggregation test with collagen, ADP, thrombin, and arachidonic acid shows a complete absence of platelet aggregation. (b) Platelet aggregation test with ristocetin shows a normal response.
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fig1
Platelet function testing revealed no platelet aggregation with ADP (10 muM), epinephrine (50 muM), collagen (2 mug/mL), arachidonic acid (0.5 mM), and normal ristocetin aggregation (1.25 mg/mL and 0.5 mg/mL; Figure 1).
Platelet aggregation study by LTA at 3 months follow-up showing a normal response to all of the agonists.
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fig2
Her platelet function test, repeated after 3 months, showed normalization of response to all of the agonists (Figure 2).