HLA-DRB1 and myeloid sarcoma: Specific Human Leukocyte Antigen (HLA) alleles, such as HLA-DRB1*15:01, HLA-DRB50*101, HLA-DR2+, HLA-DQ6, DQA 0102, and DQB1 0602, are implicated in immune modulation, significantly increasing the risk of developing MS.