Pilocytic astrocytomas carry a duplication at chromosome band 7q34 containing a BRAF-KIAA1549 gene fusion in the majority of cases.     ///    "We examined a series of 120 astrocytomas including 70 pilocytic astrocytomas WHO grade I and 50 diffuse astrocytomas WHO grade II for both, BRAF-KIAA1549 fusion with a newly developed FISH assay and mutations in IDH1 and IDH2 by direct sequencing. "