Which lab tests are performed to rule out specific differential diagnoses of myasthenia gravis (MG)?

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

Testing for rheumatoid factor and antinuclear antibodies (ANAs) is indicated to rule out systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA).

Thyroid function tests are indicated to rule out associated Graves disease or hyperthyroidism. This is essential, especially in patients with ocular MG where the concomitant hyperthyroidism is most frequent.


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