Symptoms
Treatment

Online JDM Juvenile dermatomyositis

Juvenile dermatomyositis (JDM) is an autoimmune disease causing vasculitis that manifests itself in children; it is the pediatric counterpart of dermatomyositis. In JDM, the body's immune system attacks blood vessels throughout the body, causing inflammation called vasculitis. In the United States, the incidence rate of JDM is approximately 3 cases per million children per year, leading to 300 to 500 new cases annually and affecting an estimated 3,000 to 5,000 children. Other forms of juvenile myositis are juvenile polymyositis (JPM) and juvenile inclusion-body myositis (JIBM), which are extremely rare and are not as common in children as in adults.

Cause The underlying cause of JDM is unknown. It most likely has a genetic component, as other auto-immune disease tend to run in the families of patients. The disease is usually triggered by a condition that causes immune system activity that does not stop as it should, but the trigger is almost certainly not the cause in most cases. Common triggers include immunizations, infections, injuries, and sunburn.

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