FCRL5 and myeloid sarcoma: Our study showed that genotypes CC, CT, and allele C of rs2012199—as well as genotypes AA, AG, and allele A of rs6679793 of the FCRL5 gene—are more common in the subjects with MS, whereas allele T of rs2012199 and allele G rs6679793 seemed to be protective genetic variants against the MS risk.