Cuenco et al.56 have previously reported that EVI1 with BCR–ABL induces not leukemias but a fatal myeloproliferative disorder in mice. In contrast to the usage of human EVI1 complementary DNA (in MSCV retroviral vector) in murine BMT model of Cuenco's study, we utilized murine Evi1 for Evi1 overexpression. The gene discussed is BCR; the disease is leukemia.