Dermatomyositis (DM) and polymyositis (PM) are idiopathic inflammatory myopathies, characterized by the shared feature of muscle inflammation with associated proximal skeletal muscle weakness (although an amyopathic form of dermatomyositis exists). Dermatomyositis, in addition, is also associated with a variety of characteristic skin manifestations. Dermatomyositis is relatively rare, and presents differently in adults and children. Only … Continue reading Dermatomyositis and Polymyositis