Dermatomyositis Diagnosis Criteria

Dermatomyositis is diagnosed through clinical evaluation, muscle and skin biopsies, imaging studies, and laboratory tests.

A muscle biopsy is the gold standard for diagnosing dermatomyositis, which can reveal characteristic histopathological findings such as muscle inflammation and necrosis.

Common abnormal laboratory findings in dermatomyositis include elevated levels of muscle enzymes such as creatine kinase (CK) and aldolase and abnormal electromyography (EMG) results.