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Idiopathic inflammatory myopathy refers to a group of conditions that affect the skeletal muscles (muscles used for movement). Although the condition can be diagnosed at any age, idiopathic inflammatory myopathy most commonly occurs in adults between ages 40 and 60 years or in children between ages 5 and 15 years. Signs and symptoms of the condition include muscle weakness, joint pain and fatigue. There are several forms of idiopathic inflammatory myopathy, including polymyositis, dermatomyositis, and sporadic inclusion body myositis, which are each associated with unique features. As the name suggests, the cause of the condition is currently unknown (idiopathic). However, researchers suspect that it may occur due to a combination of genetic and environmental factors. Treatment is supportive and based on the signs and symptoms present in each person.
Source: GARD Last updated on 05-01-20
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