Rickettsial infection-related encephalitis/encephalopathy with reversible splenial lesion of the corpus callosum

Mild encephalopathy with reversible splenial lesion (MERS) is a rare clinicoradiological entity characterized by a transient mild encephalopathy and MRI findings of a reversible lesion in the splenium of the corpus callosum. Here, we report an atypical case of MERS in a 22-year-old woman who presented with 2-day history of headaches and confusion associated with fever and who completely recovered within 7 days. Exhaustive biological tests panel revealed positive IgM rickettsial antibody, and the final diagnosis was MERS caused by rickettsial infection. Although viruses are the most common pathogen of MERS, for proper management, bacteria should be considered, as they may also lead to this condition.