Neonatal thyrotoxicosis is a rare emergency that carries a significant morbidity and mortality. We discuss the symptoms, signs, complications, pathogenesis, and treatment of a patient presenting to our emergency department with thyrotoxicosis. Prompt recognition and treatment of this entity is critical, for it carries a 12% to 16% mortality rate and is usually amenable to therapy. The patient responded well to treatment and is asymptomatic and on no medications at the age of two years.
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