Peripheral nervous system involvement accompanies central nervous system involvement in anti-glial fibrillary acidic protein (GFAP) antibody-related disease.

"Declarations Conflicts of interestNone declared. Patient consent for publicationAll patients received oral and written information regarding the study. Ethics approvalAll procedures in this study were carried out in accordance with the ethical standards of the Hospices Civils de Lyon (ethics approval 22_5018) and with the 1964 Helsinki declaration. Human biological samples were stored in NeuroBioTec (CRB HCL, Lyon France, Biobank BB-0033-00046). Conflicts of interest None declared."

"Funding The authors report no targeted funding. This work has been developed within the BETPSY project, which is supported by a public grant overseen by the French National Research Agency (ANR), as part of the second “Investissements d’Avenir” program (reference ANR-18-RHUS-0012). This work is supported by the European Reference Network RITA."