Hyperthyroidism
W
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Overview
From WUSTL NeuromuscularEpidemiology Myopathy Ophthalmopathy Other Associated disorders Epidemiology Female > Male Onset: Average 5th decade Hyperthyroid Myopathy (80%) Onset Slowly progressive; More common with increasing age Acute onset Rare: Most often with thyroid storm Rule out: Myasthenia gravis; Rhabdomyolysis Clinical Weakness Proximal ± Distal (20%) Distal weakness Rarely: Presenting sign Painless: Occasional myalgias Fatigue Atrophy: Shoulder girdle; Scapular winging Fasciculations Rhabdomyolysis: With thyroid storm Bulbar syndrome: Dysphagia Tendon reflexes: Brisk Lab High T3 or T4 CK: Normal or low EMG: M
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Data sourced from the Washington University Neuromuscular Disease Center. For clinical use, always refer to primary sources.