What is the role of autoimmune antibodies in the etiology of polymyositis?

Updated: Jan 05, 2021
  • Author: Mythili Seetharaman, MD; Chief Editor: Herbert S Diamond, MD  more...
  • Print

An autoimmune response to nuclear and cytoplasmic autoantigens is detected in about 60-80% of patients with polymyositis and dermatomyositis. Some serum autoantibodies are shared with other autoimmune diseases (ie, myositis-associated antibodies [MAAs]), and some are unique to myositis (ie, myositis-specific antibodies [MSAs]). The MSAs are found in approximately 40% of patients with polymyositis or dermatomyositis, whereas MAAs are found in 20-50% of these patients.

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!