To date, the laboratory tests commercially available for the diagnosis of multiple sclerosis include the measurement of Free Kappa Light Chains (kFLC) [27] and the quantification of Neurofilament Light Chains (NfL) and Glial Fibrillary Acid Protein (GFAP) levels [28,29,30,31,32,33]. Here, NEFL is linked to multiple sclerosis.