CYP2R1 and myeloid sarcoma: For rs10766197 of the CYP2R1 gene, we observed a higher frequency of the heterozygous genotype GA (50.0%) in MS patients, while in the control group, we observed an increased frequency of the wild-type homozygous genotype GG (49.6%); however, these differences were not statistically significant (p = 0.08).