<unk>  <unk>  is an idiopathic inflammatory myopathy (IMM) of presumed autoimmune dysfunction resulting in muscle weakness among other complications. It manifests itself in children; it is the pediatric counterpart of dermatomyositis. In<unk> , the body's immune system attacks blood vessels throughout the body, causing inflammation called vasculitis. In the United States, the incidence rate of<unk> S is approximately 2-3 cases per million children per year. The UK incidence is believed to be between 2-3 per million children per year, with some difference between ethnic groups. The sex ratio (Female : Male) is approximately 2:1. Other Idiopathic inflammatory myopathies include;<unk>  polymyositis (PM), which is rare and not as common in children as in adults.
Juvenile dermatomyositis
Dermatomyositis
Scleromyositis
Pyomyositis
Dermatopolymyositis
Inclusion body myositis
Hereditary neuralgic amyotrophy
Polymyositis