LGI1 and viral encephalitis: Hence, compared with anti‐LGI1 and anti‐NMDAR encephalitis, patients with anti‐GABAB receptor encephalitis usually have limited involvement of the basal ganglia, which suggests that, in addition to whole‐body tumor screening, 18F‐FDG‐PET may also be helpful in differentiating antibodies subtypes of AE.