Correspondingly, using FISH, the t(2;13)/PAX3-FKHR was found positive in 19 cases (63.5%), one case (3%) revealed the t(1;13)/PAX7/FKHR and ten cases (33.5%) were fusion-negative by this method.     ///    "From 25 samples (83%) with optimal RNA quality, RT-PCR revealed 15 cases (50%) with the t(2;13)/PAX3-FKHR. "