Two SNPs in strong LD with multiple MS-associated SNPs in the HLA region were related to expression of various HLA alleles, including HLA-DQA1, HLA-DQA2, HLA-DQB1, HLA-DRB1, HLA-DRB4 and HLA-DRB5. The gene discussed is HLA-DRB1; the disease is myeloid sarcoma.