• Luca Micci and Taylor DesRosiers.
• Medical Intensive Care Unit, Walter Reed National Military Medical Center, Bethesda, MD 20814, USA.
• Mil Med. 2023 May 16; 188 (5-6): e1330e1331e1330-e1331.

AbstractA 45-year-old otherwise healthy active duty male was admitted to the medical intensive care unit for severe acute respiratory syndrome-coronavirus 2 (SARS-CoV2) encephalopathy associated with hyperpyrexia. Magnetic resonance imaging findings demonstrated cytotoxic lesions primarily at the midline of the splenium of corpus callosum (CLOCC). Similar cases involving hyperpyrexia in the setting of SARS-CoV2 infection have demonstrated exceedingly high-mortality outcomes. Three mechanisms exist as to the likely underlying pathophysiology of SARS-CoV2-induced hyperpyrexia: direct brain injury, persistent immune dysregulation of cytokines, and vascular thrombosis. To date, no cases have reported imaging findings consistent with SARS-CoV2-induced brain injury leading to hyperpyrexia. Magnetic resonance imaging findings in this case, however, may finally elucidate the underlying mechanism for hyperpyrexia in this population. Magnetic resonance imaging findings in this case show diffusion restriction of the corpus callosum without evidence of any Central Nervous System (CNS) vessel abnormality. Given that hyperpyrexia has a clear association with increased mortality and morbidity in the SARS-CoV2 infected population, the decision to initiate steroids and remdesivir regardless of respiratory status was made for the concern for severe SARS-CoV2 infection as demonstrated by the CLOCC. Additional cases will be needed to assess their potential use as a radiological marker of disease burden.© The Association of Military Surgeons of the United States 2021. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

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