Identification of classic and complex t(15;17) and/or RAR alpha/PML gene fusion in APL by cytogenetic and dual color-FISH techniques..     ///    "In this study, t(15;17) was identified cytogenetically by using the conventional cytogenetic technique, and its molecular counterpart RAR alpha/PML fusion on chromosome 17 on interphase nuclei was further confirmed by means of dual color- (DC-) fluorescence in situ hybridization (FISH) on serial bone marrow (BM) and peripheral blood (PB) samples from APL patients at different stages of the disease. "    ///    "Overall, our findings indicate that interphase DC-FISH analysis can be a useful technique as an adjunct to conventional cytogenetic investigation for detecting the presence of RAR alpha/PML fusion in APL.. "