To identify reliable transcriptomic patterns across patient cohorts, much larger data sets are therefore required and this is the approach recently taken by Li et al. who used transcriptomic data from 351 patients to try and improve patient stratification of pediatric lysine methyltransferase 2A‐rearranged acute myeloid leukemia (KMT2A‐r AML).3 The gene discussed is KMT2A; the disease is acute myeloid leukemia.