Prognostic significance of fusion partners in pediatric MLL-rearranged AML and coexisting mutations in pediatric MLL-MLLT3–rearranged AML. (A) Comparison of patient RFS and OS according to MLL fusion partner. (B) Comparison of RFS and OS for patients with pediatric MLL-MLLT3–rearranged AML with and without coexisting mutations. Survival estimates were compared using the log-rank test.