What is in the Myopathy Literature?

This update covers the results of a randomized, placebo-controlled study that provides evidence that lamotrigine is effective in treating nondystrophic myotonias. Next, an overview of adverse effects of immune checkpoint inhibitors is provided, and the association of autoimmune myopathy and these monoclonal antibody therapies is discussed in light of recent reports. Last, the utility of electrodiagnostic testing in patients with intensive care unit weakness is addressed with emphasis on the high sensitivity and specificity of prolonged compound muscle action potential amplitudes in diagnosing critical illness myopathy.