What causes dermatomyositis (DM)?

The exact cause of dermatomyositis is not well known. It shares a lot of common characteristics with autoimmune disorders. Autoimmune disorders occur when the body’s immune system accidentally attacks healthy tissue. Similarly, in dermatomyositis, antibodies attack the body’s skin and muscle tissue. The reason this happens or what triggers this is not known.
It is thought that a compromised immune system may factor into someone developing dermatomyositis. In people with this condition, small blood vessels in the macular tissue are especially affected. Inflammatory cells surround these blood vessels and destroy muscle fibers. 
dermatomyositis (DM) causes

  • "Dermatomyositis." Mayo Clinic. Mayo Foundation for Medical Education and Research, 01 Aug. 2017. Web. 20 Sep. 2017.
  • “Dermatomyositis: What Is It?” Healthline Media. Healthline, n.d. Web. 20 Sep. 2017. 
  • “Dermatomyositis.” The Cleveland Clinic Foundation. Cleveland Clinic, 22 Sep. 2015. Web. 20 Sep. 2017. 



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