Isolated corpus callosum lesion associated with cytokine storm in COVID-19.

Coronavirus disease 2019 (COVID-19) causes many neurological complications such as cerebrovascular diseases, encephalitis, myelitis, and demyelinated disease. Here we present a rare complication of COVID-19: an isolated cytotoxic lesion of the splenium of the corpus callosum that occurred during a cytokine storm. It responded well to tocilizumab treatment, with complete regression of the lesion.