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Title: Myasthenia Graves - Background

Category: Neurology

Keywords: MG, myasthenia graves, neuromuscular weakness, autoimmune disease (PubMed Search)

Posted: 4/16/2009 by Aisha Liferidge, MD (Updated: 7/21/2026)

  • Myasthenia Graves (MG) is an autoimmune disorder wherein antibodies, perhaps created by the thymus, block the acetylcholine receptors at the post-synaptic neuromuscular junction.
     
  • The term "myasthenia graves" literally means "severe muscle-weakness" from its Greek and Latin origins.
     
  • The clinical hallmark of this disorder is muscle weakness and fatiguability, primarily affecting the facial muscles.
     
  • In spite of having personally seen about 3 cases of MG in the ED over the past couple months, this disorder is actually one of the less common autoimmune disorders, affecting 200 to 400 per 1 million persons.
     
  • Treatment includes cholinesterase inhibitors, immunosuppressants, and at times, thymectomy.

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