AFF1 and precursor B-cell acute lymphoblastic leukemia: These prognostic groups have been mostly confirmed in a historic, non-MRD risk adapted trial (UKALLXII/ECOG-ACRIN E2993, NCT00002514) in adolescents and adult B-ALL cases [83] according to the following risk assignment: standard risk genotypes: DUX4-rearranged, ETV6-RUNX1/-like, TCF3-PBX1, PAX5 P80R, high-hyperdiploid; high-risk genotypes: Ph-like, KMT2A-AFF1, low-hypodiploid/near-haploid, BCL2/MYC-rearranged; and intermediate-risk genotypes: PAX5alt, ZNF384/-like, and MEF2D-rearranged.