IDH2 and myelodysplastic syndrome: Based on the analysis of the targeted sequencing data of MDS, 17 candidate genes (DNMT3A, GATA1, GATA2, TP53, RUNX1, KRAS, NRAS, SRSF2, TET2, IDH1, IDH2, ETV6, EZH2, BCOR, PTPN11, STAG2, U2AF1) were identified.