Four breast AdCCs were recently shown to harbour the recurrent chromosomal translocation t(6;9)(q22-23;p23-24), which leads to the formation of the MYB-NFIB fusion gene.     ///    "The presence of the MYB-NFIB fusion gene was investigated in 13 AdCCs of the breast by fluorescence in situ hybridization (FISH) and reverse transcriptase-PCR (RT-PCR), and MYB and BRCA1 RNA expression was determined by quantitative RT-PCR. "    ///    Our aims were (i) to determine the prevalence of the MYB-NFIB fusion gene in AdCCs of the breast.     ///    The MYB-NFIB fusion gene was detected in all but one AdCC. 