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PPD and Sarcoid

Discussion in 'Step I' started by rcdamania, May 12, 2014.

  1. rcdamania

    rcdamania medskooljunkie 2+ Year Member

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    Jun 27, 2013
    Was reading thru FIRST AID and saw that PPD could be negative in sarcoid...does anyone know why that is?

    Thanks for the help!
     
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  3. CherryRedDracul

    CherryRedDracul Resident Sh!tposter Physician 5+ Year Member

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    Oct 12, 2012
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    Sarcoidosis is associated with anergy and suppressed cell-mediated immune responses, so a PPD may not show any reaction even if the patient was previously exposed to TB.
     

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