Genetic and Rare Diseases Information Center (GARD)

Polymyositis
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Polymyositis is one of a group of muscle diseases known as the inflammatory myopathies, which are characterized by chronic muscle inflammation accompanied by muscle weakness.  Polymyositis affects skeletal muscles (those involved with making movement) on both sides of the body.  It is rarely seen in persons under age 18; most cases are seen in adults between the ages of 31 and 60.[1] The cause of polymyositis is not fully understood.[2][3] Although there's no cure for polymyositis, treatment can improve muscle strength and function.[1][2]

References
  1. NINDS Polymyositis Information Page. National Institute of Neurological Disorders and Stroke (NINDS). 2009 Available at: http://www.ninds.nih.gov/disorders/polymyositis/polymyositis.htm. Accessed April 22, 2009.
  2. Mayo Clinic Staff. Polymyositis. MayoClinic.com. 2007 Available at: http://www.mayoclinic.com/print/polymyositis/DS00334/DSECTION=all&METHOD=print. Accessed April 22, 2009.
  3. Pappu R, Seetharaman M. Polymyositis. eMedicine. 2008 Available at: http://emedicine.medscape.com/article/335925-overview. Accessed April 22, 2009.

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