LGI1 and Mental deterioration: For example, Ren et al. [4] reported that a case with GABABR and Hu antibodies presented with seizures and sensory neuropathy, while Liu et al. [8] reported that a patient with co-existence of LGI1 and NMDAR antibodies presented with face-arm dystonic epilepsy (FBDS), cognitive decline superimposing on hyponatremia and disturbed consciousness.