Juvenile idiopatiske inflammatoriske myopatier

Juvenile idiopathic inflammatory myopathies (JIIM) is a group of rare autoimmune systemic diseases in children and adolescents, characterized by chronic skeletal muscle inflammation. Unlike in adults, dermatomyositis (JDM) is by far the most common of the idiopathic inflammatory myopathies in children and adolescents. The hallmark of JDM is calcinosis, lipodystrophy and vasculitis, findings that differs the juvenile form of dermatomyosits from the adult form. JDM is still diagnosed and classified by Bohan and Peter’s criteria from 1975. There are limited data on long time outcome of this disease