Which lab studies are performed in the workup of immune thrombocytopenia (ITP)?

Updated: Dec 14, 2019
  • Author: Michael A Silverman, MD, MD; Chief Editor: Gil Z Shlamovitz, MD, FACEP  more...
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Isolated thrombocytopenia on a complete blood cell count (CBC) is the key laboratory finding. The white blood cell (WBC) count and hemoglobin level typically are normal, unless severe hemorrhage has occurred. On peripheral smear, truly giant platelets suggest congenital thrombocytopenia. Coagulation study results are normal, and a bleeding time is not useful.

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