BRAF and pleomorphic xanthoastrocytoma: The BRAF c.1799T>A (p.V600E) mutation (BRAFV600E) results in constitutive activation of MAPK/ERK signaling and is well known in both pediatric and adult low-grade gliomas, including pilocytic astrocytoma (PA), pleomorphic xanthoastrocytoma (PXA), ganglioglioma (GG), desmoplastic infantile gangliogliomas (DIG), and dysembyoplastic neuroepithelial tumor (DNET) [20–26].