“…However, it should be noted that there is a strong association between anti-NMDA receptor encephalitis and catatonia, with most patients with this form of autoimmune encephalitis experiencing catatonia at some point in their illness ( Espinola-Nadurille et al, 2016 ; Rogers et al, 2019 ). Other autoantibodies have also been identified in association with catatonia including anti-Hu antibodies, anti-myelin oligodendrocyte glycoprotein antibodies, antinuclear antibodies (ANA), antiphospholipid antibodies, anti-ribosomal P antibodies, anti-Ro antibodies, anti-Smith antibodies, double-stranded DNA antibodies, GABA-A receptor antibodies, GAD-65 antibodies, leucine-rich glioma-inactivated 1 antibodies, ribonucleoprotein antibodies and septin-7 antibodies ( Boeke et al, 2018 ; Chuck et al, 2022 ; Endres et al, 2020 ; Ferrafiat et al, 2021 ; Fujimori et al, 2021 ; Harmon et al, 2022 ; Hinson et al, 2022 ; Inagaki et al, 2020 ; Kusztal et al, 2014 ; Pettingill et al, 2015 ; Samra et al, 2020 ; Witek et al, 2018 ). However, the prevalence and pathogenicity of these antibodies in catatonia is unclear, although it is a rapidly expanding field ( Rogers et al, 2019 ).…”