Myopathies
1. Myopathies usually cause proximal symmetric weakness, with or without other symptoms.
2. The diagnosis of myopathies often rests upon CK levels, EMG findings, and muscle biopsy.
3. Muscles contain both slow (type 1 red) and fast (type 2 white) fibers.
4. Myotonic dystrophy is the most common muscular dystrophy in adults.
5. The possibility of respiratory failure is the most serious concern in the management of most patients with myopathies.
6. Drug toxicity should always be considered in the differential diagnosis.
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