Causes of Proximal Muscle Weakness That May Mimic Inflammatory Myopathy

 • Central or peripheral neurologic disease

 • Myasthenia gravis

 • Muscular dystrophies

     - Becker

     - Limb-girdle

     - Facioscapulohumeral

     - Sarcoidosis

 • Infections

     - HIV

     - Toxoplasmosis

     - Trichinosis

     - Lyme disease

 • Various drugs and toxins

     - Corticosteroids

     - Hydroxychoroquine

     - Statins

     - Fibrates

     - Alcohol

 • Metabolic myopathies

     - Myophosphorylase deficiency

     - Carnitine deficiency

     - Mitochondrial myopathy

 • Endocrinopathies

     - Acromegaly

     - Hypo- or hyperthyroidism

     - Hyperparathyroidism

     - Hypo- or hyperadrenal disorders

 • Electrolyte disorders



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