Later, it was shown that its levels are particularly increased in B cell progenitor ALL (BCP‐ALL) with chromosomal translocation t(12;21)(p13;q22), which results in expression of ETV6‐RUNX1 fusion transcription factor.2, 3 In BCP‐ALL, this translocation is associated with good prognosis, which likely explains the correlation between WBP1L expression and favourable outcome.2 However, it is not known whether WBP1L functionally contributes to it. Here, RUNX1 is linked to acute lymphoblastic leukemia.