In Sardinia, MS is linked to DRB1*0405-DQA1*0501-DQB1*0301 and DRB1*0301-DQA1*0501-DQB1*0201, rather than DRB1*15-DQA1*0102-DQB1*0602, as it is elsewhere [14]. This evidence concerns the gene HLA-DRB1 and myeloid sarcoma.