), dermatomyositis (DM), amyopathic dermatomyositis, juvenile dermatomyositis (jDM), and juvenile myositis other than jDM(2).
DM, PM and jDM also belong to the group of rheumatic connective tissue diseases (Tab. 1). Each of them may additionally coexist with another connective tissue disease, most commonly with scleroderma and systemic lupus erythematosus, and less commonly with rheumatoid arthritis or, in children, with juvenile idiopathic arthritis (JIA). In this situation, the term overlap syndrome is used
Journal of Ultrasonography , ISSUE 80, 36–42