Clinical Evaluation of Sensory Neuronopathies: the Neuronoscore Study

Inclusion Criteria: * Patient affiliated with or beneficiary of a social security system * Patient having received appropriate study information * Adult patient ≥18 years old, male or female * Patient diagnosed with probable SN according to Camdessanché et al. diagnostic criteria * SN with one of the following etiologies: Paraneoplastic SN with anti-Hu or anti-CV2/CRMP5 antibodies SN associated with Sjögren's syndrome, systemic lupus erythematosus, or primary biliary cholangitis Platinum-salt-induced SN SN caused by CANVAS syndrome Exclusion Criteria: * Patient unable to understand or read French * Patient refusal to participate * Patient known to have another neuropathy phenotype and/or etiology that could significantly influence clinical scales and electrophysiological parameters, including: * Diabetes mellitus * Significant alcohol consumption * Severe chronic kidney disease (GFR \<30 ml/min) * Vitamin B12 and/or vitamin E deficiency * Vitamin B6 excess * Chemotherapy other than platinum salts * HIV infection