HLA-DRB1 and myeloid sarcoma: Some MHC I and II alleles have been associated with MS and each class contributes to the risk of the disease, such as HLA-A24, HLA-DRB1*15, HLA-DRB1*04, HLADRB1*03:01, HLADRB2, HLADQA1*01:02/DQB1*0602, HLADQA1*04:01/DQB1*0402, HLADQA1*05:01/DQB1*0201, and HLADQA1*05:01/DQB1*0301.