How is a diagnosis of myasthenia gravis confirmed?

Updated: Sep 20, 2018
  • Author: William D Goldenberg, MD; Chief Editor: Andrew K Chang, MD, MS  more...
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Answer

Answer

Additional tests (eg, standard electromyography, single-fiber electromyography, repetitive nerve stimulation, assays for ACh receptor antibody [ARA]) are used to confirm the diagnosis of myasthenia gravis, but these tests usually are not available on an emergent basis. [10] The ARA test offers the highest specificity of these additional tests, since these other tests only reveal a disorder of neuromuscular conduction. [11]


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