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MH Rosove, F Naeim, S Harwig and J Zighelboim
A patient with hairy cell leukemia developed purpura not attributable to
thrombocytopenia. We found markedly reduced platelet aggregation responses
and malondialdehyde production, decreased serotonin uptake, and depleted
dense granule contents. Ultrastructural studies showed that most platelets
had few or nor granules. All of the clinical and laboratory studies of
platelet function and morphology improved after splenectomy. These findings
indicate that qualitative defects in platelet function occurring in hairy
cell leukemia may cause clinically important bleeding and that the bleeding
diathesis may be ameliorated by splenectomy.
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