The fusion genes TEL/AML1 y BCR/ABL, generated by these translocations, can be easily detected using molecular biology technique.     ///    TEL/AML1 y BCR/ABL fusion genes were detected in bone marrow samples using a reverse transcriptase nested polymerase chain reaction (RT-PCR).     ///    No differences in survival were observed between children with positive or negative transcripts for TEL/AML1 fusion gene.     ///    The frequency of TEL/AML1 and BCR/ABL fusion gene transcripts in these children with ALL is similar to that described by other authors..     ///    [Frequency of TEL/AML1 and BCR/ABL fusion genes in children with acute lymphoblastic leukemia]..     ///    To study the frequency of TEL/AML1 y BCR/ABL fusion genes in children with ALL. 