Abstract
Chronic myeloid leukemia (CML) was the first neoplasm in humans associated with a chromosome rearrangement. It is characterized by the presence of the Philadelphia (Ph)chromosome, resulting from the fusion of part of the proto-oncogene ABL1, on chromosome 9 with the BCR gene, on chromosome 22, generating the BCR-ABL fusion gene. The gene product is a chimeric protein with high tyrosine ki…