Myopathies

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Overview


Myopathies are diseases that affect muscles connected to bones (called skeletal muscles), such as the biceps in the upper arm and the quadriceps in the thigh. Myopathies can be caused by inherited genetic defects (e.g., muscular dystrophies), or by endocrine, inflammatory (e.g., polymyositis), and metabolic disorders.


Nearly all types of myopathy produce weakening and atrophy of skeletal muscles, especially those muscles closest to the center of the body (called the proximal...Read the full article