blast phase chronic myelogenous leukemia, BCR-ABL1 positive crisis, blast An advanced phase of chronic myelogenous leukemia. It is characterized by: 1. the presence of blasts in the peripheral blood or bone marrow that are at least 20% of the peripheral blood white cells or of the nucleated cells in the bone marrow respectively, or 2. an extramedullary proliferation of blasts, and/or 3. when there are large aggregates and clusters of blasts in the bone marrow biopsy specimen (adapted from WHO, 2001). blastic phase chronic myelocytic leukemia blast phases phase, blast blast phase chronic myeloid leukaemia MEDGEN:2281 phases, blast blastic phase CML MONDO:0006115 blast phase chronic myelocytic leukemia blast phase chronic myelogenous leukemia blast crisis EFO:1000131 blastic phase chronic granulocytic leukaemia blastic phase chronic myeloid leukemia MESH:D001752 blastic phase chronic myelocytic leukaemia blast phase chronic myelogenous leukaemia NCIT:C9110 blastic phase chronic myeloid leukaemia blast phase chronic myelocytic leukaemia blast phase chronic granulocytic leukemia blast phase chronic myeloid leukemia UMLS:C0005699 blastic phase chronic granulocytic leukemia crises, blast GARD:0024298 SCTID:413656006 blast phase CML blastic phase chronic myelogenous leukemia blast crises blast phase chronic granulocytic leukaemia blast phase blastic phase chronic myelogenous leukaemia chronic myeloid leukemia