CSNK1A1 and myelodysplastic syndrome: Heuser et al. reported CSNK1A1 mutations in 7.2% of MDS-del(5q) patients, all missense mutations occurring either at the level of glutamic acid E98 or at the level of aspartic acid D140; the presence of CSNK1A1 mutations was associated with significantly reduced OS compared to MDS-del(5q), CSNK1A1-WT patients [48].