IL3 and acute lymphoblastic leukemia: The appearance of eosinophilia in T acute lymphoblastic leukemia/lymphoma (T-ALL) is anecdotal, having been described in a case of near-early T precursor ALL with a t(5;7)(q31;q21)/CDK6::IL3, which may have a similar functional mechanism to the IGH::IL3 rearrangement of B-ALL [45].