A triple translocation in childhood acute lymphoblastic Leukemia


Chromosomal abnormality in childhood acute lymphoblastic leukemia( ALL) has an important role in diagnosis ,management and prognosis. Fluorescence in situ hybridization(FISH) analysis using BAC probes was performed to detect a novel translocation in childhood ALL. The BAC probe RP11-111312 revealed a triple translocation involving chromosome 9,22 and 3.This BAC probe showed signals on normal chromosome 22 and derivative chromosome 3. RP11-465M18 showing only one signal on normal chromosome 9. This study confirms the triple translocation comprising chromosome 9,22,3 as a novel chromosomal abnormality in childhood ALL.