Rapid quantitative detection of TEL-AML1 fusion transcripts in pediatric acute lymphoblastic leukemia by real-time reverse transcription polymerase chain reaction using fluorescently labeled probes..     ///    "Most of the patients who achieved complete remission after 5-6 months of initial treatment were TEL-AML1 negative, although some positive samples with negligible amounts of TEL-AML1 transcripts were still detected. "    ///    TEL-AML1 expression was normalized relative to the levels of AML1 transcripts.     ///    The sensitivity attained allowed the detection of TEL-AML1 transcripts at a 10-4 dilution of a cDNA sample from a patient at diagnosis.     ///    Levels of TEL-AML1 transcript and the TEL-AML1/AML1 ratio decreased by more than four log units (p <0.001) during or after the course of initial treatment.     ///     We report a new real-time reverse transcription polymerase chain reaction (RT-PCR) method for quantification of TEL-AML1 transcripts.     ///    Standard curves were prepared using serial dilutions of plasmids with TEL-AML1 or AML1 inserts.     ///    The within-assay coefficient of variation (CV) for TEL-AML1 was 7.0% and the between-assay CV was 13%. 