We observed, that among AML patients below 61 years, those carrying the FLT3-ITD mutation had significantly lower median telomere length 0.72 ± 0.81 kb (range from 0.02 to 2.19 kb) when compared to FLT3-ITD wild type cases with median telomere length of 2.07 ± 2.30 kb (range from 0.1 to 10.35 kb) (p = 0.003; Fig. 3a). The gene discussed is FLT3; the disease is acute myeloid leukemia.