Abstract
Clonal cytogenetic aberrations of the Philadelphia chromosome (Ph) positive hematopoiesis have been associated with the natural evolution of chronic myeloid leukemia (CML) to advanced disease. Clonal aberrations of Ph negative metaphases have been described after treatment with interferon or imatinib. This study evaluates the effect of dasatinib on Ph positive clones with additional cytogenetic aberrations and the frequency of novel aberrations in Ph positive and negative metaphases. Seventy-one patients treated with dasatinib after imatinib failure for a median of nine months were evaluated. Novel aberrations within Ph positive and negative clones appeared in six and three patients, respectively.
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