<unk> es are a group of disorders that involve muscles and skin. Latest classification by European League Against Rheumatism and American College of Rheumatology (EULAR/ACR) classified idiopathic<unk>  into 6 subtypes including polymyositis, dermatomyositis, inclusion body myositis,<unk> mune−mediated necrotizing myopathies <unk> NM), amyopathic dermatomyositis, and juvenile dermatomyositis. It is considered that autoimmunity has a major role on pathogenesis of these diseases.<unk> es might present with involvement of other organs including blood vessels, lungs, connective tissue, solid organs, or joints.<unk> es are rare and may affect both children and adults. There are no definitive therapy for<unk> es. However, corticosteroids and symptomatic therapy are the first line treatment for<unk> es.<unk> munosuppressants might be used in patients who have recurrent or resistant symptoms. Lifestyle modifications including physical therapy, watching diet, and controlling weight are recommended. The prognosis of<unk> es varies and it depends on extramuscular involvement, early initiation of treatment, and presence of certain autoantibodies. Diagnosis is usually made by biopsy and detecting inflammation on muscle or skin biopsies.
Inflammatory myopathy
Nemaline myopathy
Centronuclear myopathy
Inclusion body myositis
Hereditary motor and sensory neuropathy
Congenital myopathy
Critical illness polyneuropathy
Motor neuron disease