A case of transient global amnesia with hyperintensity in bilateral hippocampal regions

Abstract

A 58-year-old woman presented to our hospital after she suddenly noticed symptoms of not being able to remember her smartphone password or safe deposit box number while she was at work. Magnetic resonance imaging (MRI) diffusion-weighted imaging (DWI) displayed hyperintensity in the right hippocampal CA1 region, and she was hospitalized with a diagnosis of transient global amnesia. Fifty hours after onset, MRI displayed hyperintensity in the bilateral hippocampal regions. In this patient, a lesion was detected early on MRI within 24 hours of symptom onset, and lesions were found bilaterally and symmetrically in the CA1 regions 50 hours after onset.