These observations suggest that the BCR-FGFR1 fusion kinase induces murine leukemia which is consistent with the human disease and, in agreement with Murati and colleagues [9], suggests that BCR-FGFR1 represents a distinct FGFR1 fusion-induced hematopoietic neoplasm. The gene discussed is BCR; the disease is hematopoietic and lymphoid cell neoplasm.