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a, b MRI showed a cystic tumor with a mural nodule enhanced after gadolinium injection. c A proliferation of oligodendrocyte-like cells associated with a rich and branched vasculature. d Well demarcation of the tumor from the adjacent cortex. e, f The tumor cells strongly expressed OLIG2 and synaptophysin. g Copy-number profile derived from DNA methylation arrays revealed 1p/19q codeletion and KIAA1549:BRAF fusion
