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Complex chromosome 8;21 translocation with associated hyperdiploidy in acute myeloid leukemia (FAB-M2).

Corral Mdel P, Villa O, Alfaro EM, Alonso CN, Baro C, Felice MS, Rossi J, Solé F, Gallego MS

Cytogenetics Laboratory, Department of Genetics, Hospital de Pediatria SAMIC "Prof. Dr. J P Garrahan", Buenos Aires, Argentina.

We present a case of acute myeloblastic leukemia (AML-M2) with a complex t(8;21) translocation and additional acquired chromosomes yielding a hyperdiploid karyotype. AML1/ETO transcript was observed by reverse transcription-polymerase chain reaction. Fluorescence in situ hybridization (FISH), spectral karyotyping (SKY), and comparative genomic hybridization (CGH) were performed to further identify the chromosomes observed by G banding. The patient was treated according to our current protocol for AML. He remains in complete remission +11 months from diagnosis. Further follow-up of this patient and the analysis of a larger number of children are needed to define whether the gains of the specific extra chromosomes modify the good prognosis that t(8;21) confers to this subgroup of AML.

Published 15 January 2008 in Pediatr Blood Cancer, 50(3): 651-4.
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