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(a) H&E, mag ×400, bright eosinophilic deposits (black arrows) representing Rosenthal fibers in astrocytic component admixed with ependymal component (white arrows), adjacent to pseudorosette formation (arrowhead). (b) H&E mag ×40, pseudocapsule (black arrow) with exclusively ependymal component at periphery of the lesion (arrowheads); astrocytic component is in the center (white arrow).
