What are the lab criteria for diagnosis of antiphospholipid syndrome (APS)?

Updated: Sep 30, 2018
  • Author: Suneel Movva, MD; Chief Editor: Herbert S Diamond, MD  more...
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Answer

Laboratory criteria include any of the following (see also Lab Studies):

  • Medium to high levels of immunoglobulin G (IgG) or immunoglobulin M (IgM) anticardiolipin (aCL) Anti–beta-2 glycoprotein I

  • Lupus anticoagulant on at least two occasions at least 12 weeks apart


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