The BCR::ABL1 fusion is typically associated with a B/myeloid immunophenotype MPAL (an example case of BCR::ABL1 rearranged B/myeloid-monocytic (bilineal, pattern 1c, in Figure 4)), but other immunophenotypic variants, such as AUL, T/myeloid, and B/T or B/T/myeloid MPAL, can occasionally occur [14,15,16]. The gene discussed is BCR; the disease is mixed phenotype acute leukemia.