Sandbox Myopathy

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Differentiating Various Muscle Weakness

Symptoms Physical Examination Diagnosis
Age of onset Muscle weakness Fatigue Myalgia Cramps Myoglobinuria Laboratory Findings Creatine Kinase Muscle Biopsy Electromyogram
Proximal DIstal
Medications
Corticosteroids
Statins
Anti-Thyroid
Chemotherapeutic
Organophosphate intoxication
Alcohol Variable +
Endocrine
Adrenal insufficiency
Cushing's disease
Secondary hyperparathyroidism
Hyperthyroidism
Hypothyroidism
Inflammatory / Rheumatologic
Dermatomyositis
Polymyositis
Inclusion body myositis
Fibomyalgia
Polymyalgia Rheumatica
Chronic Pain Syndrome
Genetic
Becker muscular dystrophy
Limb-girdle muscular dystrophies
Myotonic dystrophy type 1
Infectious
Lyme disease
Infulenza
Polio
Syphilis
HIV
Neurologic
ALS
Stroke
GBS
Multiple Sclerosis
Neuro-muscular
Botulisim
Lambert-Eaton myaes
Myasthenia gravis
Paraneoplastic
Metabolic
Glycogen storage disease
Lipid storage disease
Mitochondrial