What is Myasthenia Gravis?

Myasthenia gravis (MG) is a chronic neuromuscular disorder - deriving its name from Latin and Greek words meaning "grave muscle weakness."  There is no known cause nor cure for myasthenia gravis and the role of heredity in MG is uncertain. Symptoms include severe muscle weakness that is characterized by difficulty in moving, breathing, chewing, swallowing and impairment of speech or vision.  MG may involve either a single muscle or a group of muscles.  The weakness increases with activity and decreases with rest.

MG may affect an individual of any age or race including the newborn child.  However, the disease is seen more frequently in the young adult female and in the middle-aged male.  In Allegheny County of Pennsylvania, approximately 1 in 6,600 people are diagnosed with MG, although the actual incidence is probably much higher due to delayed diagnosis or misdiagnosis.  Once diagnosed, however, there are several treatment options available that can improve the quality of life and ultimate life expectancy of those with MG.  Many people with MG can live relatively normal lives with the medication or other treatment.

For more information on MG, please visit our education section.