Treatment of early and refractory dermatomyositis with infliximab: a report of two cases.

The idiopathic inflammatory myopathies embody the largest group of acquired and potentially treatable causes of skeletal muscle weakness. The three major groups of this disorder are polymyositis (PM), dermatomyositis (DM), and inclusion body myositis. Corticosteroids continue to be the mainstay of initial treatment in the majority of cases of PM/DM.