KIF21B and myeloid sarcoma: In a study analyzing more than 30 000 SNPs in 931 MS trio families (both parents plus one child with the disease), 3507 isolated MS cases, and 8024 controls from the USA and the UK, the allelic variant rs12122721 G of KIF21B gene was reported as a novel susceptibility locus for MS (p = 6.56 × 10−10) [150].