Clinical, Electrophysiologic, and Pathologic Features of Anti-Contactin–Associated Protein 1 Autoimmune Nodopathy

IgG4 Caspr1 AN presents with a similar clinical phenotype to other nodopathies (e.g., neurofascin 155 and contactin 1), but with an older age at onset. Changes in antibody titers may be a potential biomarker for monitoring disease activity.