BCR and chronic myelogenous leukemia, BCR-ABL1 positive: Ichinohasama et al reported two cases of Ph-negative non-Hodgkin’s lymphoma (NHL) occurring in CML and reviewed the literature concerning Ph+ and Ph− lymphoma (15); the FISH of BCR/ABL was considered to be the essential test for blast crisis of CML while the PCR of BCR/ABL was not.