The conditions in this complex are characterized by muscle damage due to an inflammatory process of the blood vessels that lie under the skin and muscles. Skin changes around the eyelids and over the knuckles and finger joints are also seen.
Juvenile dermatomyositis is the condition most often seen in children.
Juvenile dermatomyositis occurs relatively infrequently, but more often in girls about the age of 7. The cause of juvenile dermatomyositis has not yet been determined. However, factors which are thought to be associated with dermatomyositis include dysfunction of the immune system, resulting in infections. The symptoms of juvenile dermatomyositis often appear gradually. At times, there may be a more acute, or intense, onset of symptoms.