Figure 2:
Representative brain magnetic resonance and fluorodeoxyglucose positron emission tomography imaging from AMPAR encephalitis patients. Axial magnetic resonance T2 fluidattenuated inversion recovery (FLAIR) images (left) are shown alongside of fluorodeoxyglucose positron emission tomography (FDG-PET) images (right) from exemplar cases presenting with AMPAR encephalitis. In Case 1, T2-FLAIR reveals bilateral, right greater-than left hippocampal hyperintensities. FDG-PET demonstrates global hypometabolism with sparing of bilateral motor cortices. Case 2 demonstrates T2-FLAIR hyperintensities in the bilateral cerebellum, with corresponding FDG-PET hypermetabolism.