Anti-Leucine-Rich Glioma-Inactivated 1 Limbic Encephalitis with Normal Magnetic Resonance Imaging Detected on Fluordeoxygluose Positron Emission Tomography/Computed Tomography.

Leucine-rich glioma-inactivated 1 (LGI1) antibody encephalitis is an emerging autoimmune disorder with antibodies to the voltage-gated potassium channel complex. Here, we report clinico-imaging findings of a 77-year-old female presenting with acute-onset seizures, normal magnetic resonance imaging and with abnormal fluordeoxygluose positron-emission tomography-computed tomography and positive anti-LGI1 antibodies on immunofluroscence assay.