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Archives of Medical Case Reports
ISSN: 2691-7971

Pseudothrombocytosis Due to Red Blood Cell Fragmentation in Haemoglobin-H Disease.


Abstract :

Introduction: Red cell fragmentation may result in erroneously high platelet counts by automated blood counters. Therefore, any  abnormal platelet counts in a full blood count analysis should be re-evaluated either using blood film manual counting or with more  accurate automated analysis options. Case Report: We report a case of Haemoglobin-H disease that was noted to have a very high  platelet count, by newly installed automated blood analyser, during regular follow up. Manual platelet counts and the automated  analysis using flowcytometric counting of the same analyser showed a normal platelet count. Conclusion: A wide spectrum of  blood disorders can cause pseudothrombocytosis. Whenever an unexpected high platelet count is encountered, alternative modalities  should be used to confirm the actual platelet count such as manual count on a blood film. Furthermore, machines using the impedance  principle need to be calibrated to reduce the chances of getting abnormal results with actual normal platelet counts.