ERVW-1 and myeloid sarcoma: Human endogenous retrovirus of the W family (HERV-W) is repeatedly associated with MS neuroinflammation, but its relationship with neural injury biomarkers is unclear.<h4>Methods</h4>We measured anti-pHERV-W, -syncytin-1 IgG and their Ratio (HERV-W) in 83 RR-MS patients and 112 healthy controls (HC).