Our model, that included 149 patients and 147 controls, showed (after adjusting by sex) that females with LBS, smokers and those who had HLA-DRB1*15:01 allele had a higher MS risk versus males with PS, non-smokers and who did not have the HLA-DRB1*15:01 allele. Here, HLA-DRB1 is linked to myeloid sarcoma.