Shu Y, et al. - This study was performed to investigate the relationship between serum cystatin C (CysC) with anti-N-Methyl-D-aspartate receptor (anti-NMDAR) encephalitis. An association of serum levels of CysC with anti-NMDAR encephalitis and its clinical parameters was observed. In addition, the changes in CysC levels correlated with therapeutic effect. The findings, therefore, gave new insights into the association between serum CysC and anti-NMDAR encephalitis.