Reverse transcription-polymerase chain reaction (RT-PCR) analysis showed the presence of AML1/ETO fusion transcripts identical to those found in classical t(8;21).     ///    "Using a dual-color FISH test with ETO and AML1 probes, we demonstrated an AML1/ETO fusion signal on the derivative chromosome 8. "    ///    "The present case highlights the relevant role of the rearranged chromosome 8, which encodes the AML1/ETO fusion product in the pathogenesis of AML-M2.. "