TEL-AML1 fusion transcripts were searched for in the 39 adult- and 45 childhood-ALLs for which material was available.     ///    "TEL-AML1 transcripts were detected in only 1 of 31 adult BCP-ALLs (P = .04, Fisher's exact test). "    ///    "We have evaluated the frequency of this newly described translocation in acute lymphoblastic leukemia (ALL), and the feasibility of minimal residual disease (MRD) monitoring by polymerase chain reaction (PCR) amplification of TEL-AML1 transcripts. "    ///    TEL-AML1 transcripts were never found associated with any other fusion transcripts.     ///    "Nevertheless, in this adult case, TEL-AML1 transcripts were found at a low level in 2 of 3 different samples. "    ///    TEL-AML1 transcripts were found in 8 out of 35 (23%) childhood B-cell precursor ALLs (BCP-ALLs).     ///    "No TEL-AML1 transcripts were detected in 11 T-cell ALLs (4 adults and 5 children), nor in 2 B-cell (slg+) ALLs. "    ///    This study shows that TEL-AML1 transcripts are frequently detected in pediatric BCP-ALLs and that these transcripts are molecular targets that will simplify the strategy of MRD monitoring in childhood BCP-ALL..     ///    TEL-AML1 fusion RNA as a new target to detect minimal residual disease in pediatric B-cell precursor acute lymphoblastic leukemia.. 