Myopathy was defined by muscle weakness, elevated creatine kinase (CK) levels, myopathic EMG findings, muscle edema on MRI, and/or features of myopathy on muscle biopsy. The researchers identified ...

Serum creatine kinase levels were moderately elevated, and electromyogram (EMG) showed a myopathic pattern of abnormalities. Muscle biopsies were performed in all affected patients. By light ...