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Petechiae and purpura

  • Common ddx

    • thrombocytopenia
      • ITP
      • TTP
    • HSP
    • vasculitis
  • Serious ddx

    • meningitis
    • endocarditis
    • leukemia
    • DIC
  • Labs

    • CBC with diff, platelets
    • blood smear
    • Chem
    • coags
    • ESR, ANA, complement levels, ANCA
    • blood culture if suspect infection
    • UA
    • LP if suspect meningitis (head CT to r/o ICP before LP if needed)
    • SPEP, marrow biopsy if suspect leukemia
    • skin biopsy if suspect vasculitis

  • Print | Citations

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