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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