Chronic myeloid leukemia with rare e1a3 BCR-ABL transcript

ABSTRACT

Chronic myelogenous leukemia [CML] results from neoplastic transformation of a hematopoietic stem cell. It is cytogenetically characterized by the presence of Philadelphia chromosome which results from reciprocal translocation t[9;22] that juxtaposes the ABL gene on chromosome 9 with breakpoint cluster region [BCR] on chromosome 22 generating BCR-ABL oncogene. All BCR-ABL fusion proteins display activated tyrosine kinase activity. Their different types are associated with different clinical course and prognosis. We report a rare case of e1a3 BCR-ABL transcript. So far only 4 cases in patients with CML have been reported