H1N1 infection-induced thyroid storm.

A thyroid storm is a life-threatening exacerbation of thyrotoxicosis, and is usually characterized by hyperthermia, tachycardia, severe agitation and altered mental status. A thyroid storm may be triggered by many causes, including systemic pulmonary infections. Delay in prompt diagnosis leads to high mortality. We present the first case of H1N1 infection triggering a thyroid storm. The delay in diagnosis because of preoccupancy with the H1N1 pandemic may have contributed to the poor outcome. When assessing cases with H1N1 infection, physicians should be more vigilant in order not to miss other important diagnoses.