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  • Title: Generation of the BCR/ABL fusion gene in a Philadelphia chromosome-negative chronic myeloid leukaemia: insertion of 5.6 Mb of 9q34 into the BCR region of chromosome 22.
    Author: Valle L, Fernández V, Pérez-Pons C, Sánchez FG, Benítez J, Urioste M.
    Journal: Hematol Oncol; 2006 Jun; 24(2):86-8. PubMed ID: 16598834.
    Abstract:
    This report describes a chronic myelogenous leukaemia patient with an apparently normal bone marrow karyotype but BCR/ABL fusion-gene-positive. Commercial FISH probes showed an atypical pattern and the BCR/ABL fusion transcript was detected by RT-PCR, but not the reciprocal ABL/BCR. Consecutive FISH assays clarified the mechanism of the masked Ph. The ABL gene and the following 5.6-5.7 Mb of 9q are inserted into the BCR region of chromosome 22. There is no transference of 22q material to chromosome 9 or to any other chromosomes. Clinical features and evolution of the patient are similar to those cases with classic Ph chromosome.
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