KMT2A and acute lymphoblastic leukemia: Of note, the diagnosis was updated for 11 cases from nine patients (additional 6.7% of cohort), including four BCOR-rearranged sarcomas, a kidney clear cell sarcoma with a BCOR internal tandem duplication (ITD)51, two infant lymphoblastic leukemias with MLL partial tandem duplications and two megakaryoblastic leukemias with sarcomatous components.