What is the diagnostic accuracy of the anti–acetylcholine receptor (AChR) antibody test for myasthenia gravis (MG)?

Updated: Aug 27, 2018
  • Author: Abbas Jowkar, MD; Chief Editor: Nicholas Lorenzo, MD, MHA, CPE  more...
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Answer

The anti–acetylcholine receptor (AChR) antibody test for diagnosing MG has the following characteristics:

  • High specificity (up to 100% [4] )

  • Positive in as many as 85% of patients who have generalized MG [4]

  • Positive in only 50% of patients who have purely ocular MG [4]


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