Which tests may be performed to identify the cause of myopathy?

Updated: Dec 28, 2017
  • Author: Courtney A Bethel, MD, MPH; Chief Editor: Barry E Brenner, MD, PhD, FACEP  more...
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Answer

Steroid therapy should be withheld until a definitive diagnosis is made, but many tests that are essential for distinguishing among the varied causes of myopathy are out of the scope of the emergency physician. These tests include the following:

  • Genetic testing
  • Antinuclear antibody (ANA) [10, 11]
  • Magnetic resonance imaging (MRI) [10]
  • Electromyography (EMG)
  • Muscle biopsy [10, 12]

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