We compared the transcriptomes of primary leukemic cells from KMT2A/MLL-R+vs. KMT2A/MLL-R- AML and ALL patients with an emphasis on the relative gene expression levels of for 21 PTK, including ERBB1, FGR, FLT3, FYN, HCK, JAK2, LCK, LYN, MERTK, SRC, BLK, BMX, BTK, ERBB2, ERBB3, JAK1, JAK3, PTK2, SYK, TEC, TYK2. This evidence concerns the gene FGR and acute lymphoblastic leukemia.