Moreover, serum apoM levels positively correlated with serum high-density lipoprotein cholesterol (HDL-C) and apoA1 levels and negatively correlated with proteinuria in PNS patients (r = 0.458, P = 0.003; r = 0.254, P = 0.022; r = −0.414, P = 0.028). This evidence concerns the gene APOA1 and paraneoplastic neurologic syndrome.