The resulting fusion transcript, termed TEL-AML1, has been associated with an excellent prognosis at initial ALL diagnosis.     ///    TEL-AML1 fusion transcript in relapsed childhood acute lymphoblastic leukemia.     ///    Screening for TEL-AML1 should become routine at relapse diagnosis and might be used for therapy stratification in future trials..     ///    "At a median follow-up time of 21.5 months, children positive for TEL-AML1 had a significantly (P = .0011) higher probability of event-free survival (EFS. "    ///    TEL-AML1 positivity predicted a favorable short-term outcome.     ///    "To address this assumption and to investigate the prognostic significance of TEL-AML1 expression in relapsed childhood ALL, bone marrow samples of 146 children were analyzed by reverse-transcriptase (RT)-polymerase chain reaction (PCR). "    ///    "Thus, the incidence of TEL-AML1 in relapsed Ph1-negative, B-cell precursor ALL is 32 of 133 (24%). "    ///    "Hence, we postulated that the incidence of TEL-AML1 fusion should be lower in patients with ALL relapse. "