This kind of analysis found reliable associations of MS in subgroups of DRB1*15(2) (or DQB1*0602)-positive or negative individuals with the carriership of some alleles of genes coding TCRβ receptor [14], TGFβ1 [16], CTLA4 [13], ICAM-1 [19] and interleukin 4 receptor [18]. Here, CTLA4 is linked to myeloid sarcoma.