Our findings indicated high concentrations of anti‐HERV‐W, anti‐HERV‐K, and anti‐MOG antibodies in the CSF of MS patients when compared to IIH patients, corroborating previous studies which described the presence of anti‐HERV‐W and K in CSF of MS patients [19, 20]. This evidence concerns the gene ERVW-1 and myeloid sarcoma.