We prospectively monitored AML1-ETO rearrangement by real-time quantitative PCR (RQ-PCR) in 21 patients uniformly treated in our center.     ///    Comparison of BM and PB samples showed similar sensitivity for detecting AML1-ETO transcript.     ///    "At diagnosis, levels of AML1-ETO transcript showed large variations and there was a trend for a higher relapse rate in patients with high pretreatment expression levels (P=0.065). "