To evaluate at molecular level potential affinities between these tumors, we investigated a case of RGNT, arising in the cerebellum of a young patient, for the presence of transcriptional products originating from the KIAA1549-BRAF fusion.     ///    Further studies in larger RGNT case series are needed in order to demonstrate the possible presence of KIAA1549-BRAF fusion and better delineate its relationship with pilocytic astrocytomas..     ///    Analysis of KIAA1549-BRAF fusion status in a case of rosette-forming glioneuronal tumor of the fourth ventricle (RGNT).. 