INTRODUCTION
The inflammation and inflammatory responses caused by the Coronavirus Disease 2019 (COVID-19) involve the thyroid1. Evidence suggests that COVID-19 involves the hypothalamic-pituitary-thyroid axis. Various manifestations of thyroid disease have been observed in COVID-19 cases, including hypothyroidism, thyrotoxicosis, and nonthyroidal illness syndrome2. Thyrotoxicosis, which has been observed during the initial phase of subacute thyroiditis and Graves’ disease, can be caused by COVID-19 as well2-4. Thyroid storm is a life-threatening condition accompanied by severe clinical manifestations of thyrotoxicosis; however, it has not yet been reported in COVID-19 cases. Nevertheless, due to the importance of thyroid storm, it is necessary to consider the coincidence of this condition in COVID-19 cases.