What is in the Myopathy Literature?

This update begins with the incidence and features of statin-associated muscle symptoms, which may often be misattributed. Articles on potential muscle mitochondria dysfunction from statins follow, along with recommendations for possibly avoiding statins in some patients with genetic myopathies. Next, autoimmune myopathies, including immune-mediated necrotizing myopathy, myositis with antimitochondrial antibodies, and overlap myositis with lupus, as well as the role of myxovirus protein A identification in muscle specimens, are addressed. The next section includes reports on the significance of elevated serum aldolase with normal creatine kinase and recommended approaches to evaluate a patient with rhabdomyolysis. A cluster of reports on muscle imaging, particularly using ultrasound and magnetic resonance imaging, are covered. They include studies of inherited and inflammatory myopathies and neck extensor myopathy on topics such as imaging features, patterns of involvement, diagnostic utility, and correlation with histopathology. Last, there are discussions on mexiletine versus lamotrigine for nondystrophic myotonias and the treatment of fatty acid oxidation disorders in adults.