SERPINE1 and myeloid sarcoma: Zivković et al. reported the PAI 5G5G genotype as a risk factor for MS pooled (Serbian, Bosnian and Herzegovinian, Croatian, and Slovenian) patients ([1]); Luomala et al. found that the 5G5G genotype was associated with MS in Finnish women, and Lovrecic et al. describe a borderline significance of TPA DD/PAI-1 4G4G genotype combination for reduced risk for MS Slovenian and Croatian patients [18].