Recently, the interleukin 7 receptor (IL7R) interleukin 2 receptor (IL2R), ecotropic viral integration site 5 (EVI5) [4] and kinesin family member 1B (KIF1B) [5] genes have been shown to be additional MS susceptibility loci [3,6,7]. The gene discussed is KIF1B; the disease is myeloid sarcoma.