Proximal muscle weakness, characteristic skin rash and elevated muscle enzymes are routinely used to identify<unk> . Typical magnetic resonance imaging and muscle biopsy changes are considered the next most useful diagnostic criteria, followed by myopathic changes on electromyogram, calcinosis, dysphonia and nailfold capillaroscopy. Other useful criteria include myositis-specific or -related antibodies, nailfold capillaroscopy, factor VIII-related antigen, muscle ultrasound, calcinosis and neopterin.
Juvenile dermatomyositis
Dermatomyositis
Scleromyositis
Pyomyositis
Dermatopolymyositis
Inclusion body myositis
Hereditary neuralgic amyotrophy
Polymyositis