Abstract
The upfront application of molecular methods for identifying the fusion transcripts arising from balanced translocations in haematopoietic malignancies has several advantages: sensitivity is independent of its frequency, i.e. rare ones are not missed, cytogenetically cryptic aberrations are identified and it provides a platform for minimal residual disease (MRD) detection. Employing a multiplex reverse transcription polymerase chain reaction (RT-PCR) assay identifying 27 fusion transcripts we prospectively analysed blood and/or bone marrow samples from 390 patients referred for diagnosis and treatment for acute leukaemia and chronic myeloproliferative disorders (CMPD) from a geographically well-defined region in Denmark. A total of 233 patients were diagnosed with acute myeloid leukaemia (AML), 95 with acute lymphoblastic leukaemia (ALL) origin and 62 patients were recorded as CMPD. Twenty-three percent AML, 32% ALL and 55% CMPD patients exhibited chromosomal aberrations detected by the multiplex RT-PCR. Cytogenetically cryptic translocations were seen in 15% of the cases. Conversely, the cytogenetic analysis identified chromosomal aberrations other than translocations in 45% of AML cases and 63% of ALL cases. We conclude that,...Continue Reading
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