Polymyositis: Causes
Pathogenesis (disease development) The exact causes of polymyositis have not yet been determined. What has been proven so far are genetic factors (HLA associations) and pathologic autoimmunologic processes, meaning that the body’s immune system attacks myocytes (muscle cells). In contrast to dermatomyositis, in which antibodies cause myositis (muscle inflammation) by damaging the small blood vessels, … Polymyositis: Causes