Characterisation of genomic translocation breakpoints and identification of an alternative TCF3/PBX1 fusion transcript in t(1;19)(q23;p13)-positive acute lymphoblastic leukaemias..     ///    "We here report an alternative TCF3/PBX1 transcript, fusing exon 17 of TCF3 with exon 5 of PBX1, in a paediatric t(1;19)-positive ALL. "    ///    "Hence, ALLs with t(1;19) that test negative for TCF3/PBX1 should be analysed further before excluding this alternative fusion. "    ///    "Furthermore, we have characterised the genomic translocation breakpoints in eight TCF3/PBX1-positive ALLs. "