Patient Pedigree Sex AL 3 1 M AML 4 1 M 5 2 F 7 2 F 9 4 F 12 6 M 13 7 F 14 8 F 16 10 M 22 13 F 24 25 14 15 M F Mutation RUNX1 p.R177Q RUNX1 p.A160T FLT3-ITD PHF6 p.S176VfsX16 KIT p.D816V T-ALL RUNX1 p.R177Q NOTCH1 p.F1592S PHF6 p.H329R WT1 p. V371RfsX2 AML RUNX1 p.Q308RfsX259 RUNX1 p.G138PfsX12 T-ALL followed by t- RUNX1 p.Q308RfsX259 AML 5 years later KRAS p.G12D before AML RUNX1 p.R139X development KRAS p.I36M AML RUNX1 p.R139X KRAS p.I36M RAD21 p.R586X T-ALL RUNX1 p.G108V WT1 p. R462W WT1 p.V371SfsX19 FLT3-ITD FLT3-TKD p.D835Y AML RUNX1 p.D305TfsX262 SRSF2 p.P95L WT1 p.E384VfsX66 WT1 p.Val374GfsX12 TET2 p.T1280RfsX86 AML RUNX1 p.H377PfsX191 RUNX1 p.S114P SF3B1 p.K700E AML RUNX1 p.G143RfsX43 RUNX1 p.K83Q BCORL1 p.R1420X FLT3-ITD AML RUNX1 p.T219RfsX8 CBL p.L380P MPL p.W515L TP53 p.G245D WT1 p.R369X AML RUNX1 p.T121HfsX9 AML RUNX1 p.A129E SRSF2 p.P95L Variant allelic frequency (%) 52 44 39 8 2 52 23 53 24 46 ND ND ND 48 4 81 45 31 52 33 11 15 5 63 39 31 40 8 45 34 4 51 42 77 11 83 80 10 51 6 49* 30 29 Supplementary Table 1. Variant allelic frequency for mutated genes in FPD/AML patients who developed acute leukemia Abbreviations: M: male, F: female, AML: acute myeloid leukemia, T-ALL: T- acute lymphoblastic leukemia, ND: not done, *not done at leukemic stage, sample collected at the time of complete remission