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Thyroid storm is a rare, life-threatening endocrine emergency characterized by severe hyperthyroidism with multi-organ dysfunction. It typically occurs in patients with untreated or inadequately treated hyperthyroidism when exposed to precipitating factors such as infection, surgery, or iodine exposure.
Excessive thyroid hormone release leads to hypermetabolism, increased oxygen consumption, and enhanced sympathetic nervous system activity. The resulting physiologic stress causes cardiovascular instability, hyperthermia, and altered mental status through direct cellular effects and beta-adrenergic stimulation.
Diagnosis requires high clinical suspicion as laboratory values may not differ significantly from uncomplicated hyperthyroidism. The Burch-Wartofsky scoring system helps differentiate thyroid storm from severe hyperthyroidism by incorporating fever, cardiovascular symptoms, CNS dysfunction, and precipitating factors. Immediate treatment with antithyroid medications, beta-blockers, corticosteroids, and supportive care is essential to prevent mortality.