WBP1L and acute lymphoblastic leukemia: The WBP1L gene is a target gene of ETV6, which suppresses its expression.4 In ETV6‐RUNX1+ BCP‐ALL, one allele of ETV6 is inactivated by fusion with RUNX1, while the other is often inactivated as well.26 This could explain the increase of WBP1L expression in ETV6‐RUNX1+ BCP‐ALL.