Abstract
Cognitive impairment (CI) is a common clinical feature of multiple sclerosis (MS), but its pathophysiology is only partially known. Cerebrospinal fluid (CSF) biomarkers, by reflecting the ongoing pathology, may help in better understanding the determinants of CI in MS. Kappa free light chain index (k-index) is a sensitive biomarker of intrathecal B cells activation. Herein, we investigated the association between k-index and cognitive performance in MS patients.
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