AML1/ETO fusion transcripts were neither found in the PB and BM of a healthy individual, nor in the PB of a patient after allogeneic BMT for cytogenetically proven t(8;21)-leukemia.     ///    Our results indicate the presence of cells carrying the AML1/ETO rearrangement in the PB and BM of all patients in CHR after chemotherapy or ABMT for t(8;21)-positive AML.     ///    AML1/ETO fusion mRNA can be detected in remission blood samples of all patients with t(8;21) acute myeloid leukemia after chemotherapy or autologous bone marrow transplantation..     ///     The chromosomal translocation t(8;21)(q22;q22) in acute myeloid leukemia (AML) can be detected by a reverse transcription-polymerase chain reaction (RT-PCR) for the chimeric AML1/ETO transcript.     ///    "AML1/ETO mRNA was also detected in the PB of two patients in CCR, 10 or 12 months after ABMT. "