iFISH combined with CC and RT-PCR can increase the detection rate of t(1;19)/TCF3-PBX1 fusion gene..     ///    " To explore the morphology, immunophenotype, cytogenetics and clinical features of TCF3-PBX1 fusion gene positive adult acute lymphoblastic leukemia (ALL). "    ///    "R banding was used to analyze conventional cytogenetics (CC), interphase fluorescence in situ hybridization (iFISH) and RT-PCR to detect the TCF3-PBX1 fusion gene, and flow cytometry to immunophenotype. "    ///    "TCF3-PBX1 fusion gene was detected by RT-PCR in 9 cases, and by iFISH in 17. "    ///    [A clinical and laboratory study of TCF3-PBX1 positive adult acute lymphoblastic leukemia.].. 