GPX4 and myeloid sarcoma: In the case of the c.660 T > C—GPX4 polymorphism, the C/C homozygote (Crude OR 0.551; 0.335–0.909 95% CI; p < 0.05) and the C allele (Crude OR 0.628; 0.445–0.886 95% CI; p < 0.01) were associated with a reduced risk of MS development, while genotype T/T (Crude OR 1.893; 1.003–3.573 95% CI; p < 0.05) and allele T (Crude OR 1.592; 1.129–2.246 95% CI; p < 0.01) of the same SNP were associated with an increased risk of the disease (Table 1).