APOE and thromboangiitis obliterans: TAO patients with hyperlipidemia exhibited higher TC, TG, LDL-c, apolipoprotein A (ApoA), apolipoprotein B (ApoB), and apolipoprotein E (ApoE) levels, as well as lower HDL-c levels, compared with TAO patients without hyperlipidemia (p < 0.05).