APOA1 and paraneoplastic neurologic syndrome: As shown in Table 2, the serum apoM concentration positively correlated with THOL, HDL-C, and apoA1 in the hyperlipidemia group (r = 0.393, P = 0.016; r = 0.363, P = 0.038; and r = 0.334, P = 0.004, respectively); we found that apoM positively correlated with HDL-C and apoA1 in the patients with PNS and hyperlipidemia (r = 0.231, P = 0.045; and r = 0.324, P = 0.019, respectively).