NRAS and acute promyelocytic leukemia: In a Chinese report on 84 APL samples studied by RT-PCR, the prevalence of mutations was 60.7% (51/84), with 27.4% FLT3-ITD mutations, 14% WT1 mutation, 10% FLT3-TKD, 8% TET2, 6% N-RAS, 5% ASXL1, 2% EZH2 mutations and 1% each for MLL-PTD, IDH1 and CBL mutations, respectively.