Patients with muscle disorders are a diagnostic challenge to physicians, because of the various ways of presentation. A comprehensive approach should be followed systematically in order to reach the correct diagnosis. Weakness is a common symptom among patients including those with central or peripheral nervous systems diseases and those with muscular and/or neuromuscular diseases. Muscle weakness is not only a regular finding in rheumatologic diseases, but in inflammatory myopathies as well. This chapter focuses on skills needed to approach any patient that presents with weakness, specifically proximal myopathy.
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