However, we found no cases showing KIAA1549-BRAF gene fusion or BRAF                         (V600E) mutation.     ///    Absence of KIAA1549-BRAF fusion in rosette-forming glioneuronal tumors of the fourth ventricle (RGNT).    ///    Absence of KIAA1549-BRAF fusion in rosette-forming glioneuronal tumors of the fourth ventricle (RGNT)..     ///    "To evaluate potential similarities at the molecular level between these tumors, we analysed a series of 10 RGNT for the presence of KIAA1549-BRAF fusions using interphase fluorescence in situ hybridisation. "