Pretransplant MRD detection of fusion transcripts is strongly prognostic in KMT2A-rearranged acute myeloid leukemia

Pretransplant detection of KMT2Ar measurable residual disease ≥0.001% by quantitative polymerase chain reaction was associated with significantly inferior posttransplant survival (2-year relapse-free survival 17% vs 59%; P = .001) and increased 2-year cumulative incidence of relapse (75% vs 25%, P = .0004).