Abstract
A 63-year-old woman presented with leukocytosis (278 × 109/L) with 72% blasts. Bone marrow blast cells showed cytogenetic abnormality with 46,XX, t(9;22), inv(16). Despite achievement of hematological remission by induction chemotherapy, Philadelphia chromosome did not disappear; chronic myeloid leukemia (CML) in blast crisis (BC) was thus diagnosed. The P190 BCR/ABL fusion transcript was detected. Imatinib mesylate introduced a hematological remission of short duration; however, infiltration into the central nervous system occurred, and the patient died 7 months after presentation. Coexistence of inv(16) and t(9:22) has been described in CML-BC and de novo AML, and CML-BC patients always carry P210 BCR/ABL, while de novo AML patients usually have P190 BCR/ABL. To the best of our knowledge, this is the first report of CML-BC with inv(16) and P190 BCR/ABL. We discuss this case with reference to the literature.
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Ninomiya, S., Kanemura, N., Tsurumi, H. et al. Coexistence of inversion 16 and the Philadelphia chromosome comprising P190 BCR/ABL in chronic myeloid leukemia blast crisis. Int J Hematol 93, 806–810 (2011). https://doi.org/10.1007/s12185-011-0854-3
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DOI: https://doi.org/10.1007/s12185-011-0854-3