Presence of BCR-ABL1-positive cells in hematopoietic lineages. Presence of BCR-ABL1-positive cells in hematopoietic lineages (A, ALL blasts; B, non-ALL B cells; G, granulocytes; M, myeloid cells/monocytes; T, T cells) at diagnosis in ALL patients with concordant (A) and discordant (B) MRD courses and in CML patient (C). The MRD levels are shown for Ig/TCR (dashed line) and BCR-ABL1 genomic breakpoint (full line); the gray area represents the level of sensitivity of the Ig/TCR quantification. NA, not available.