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(A) Photomicrograph of the forebrain mass. The neoplasm is highly cellular and is composed of interlacing bundles of plump spindle cells with mitotic activity (blue arrow), and embedded multifocal tyrosine crystals (red arrows). Scale = 100 μm. (B) Higher magnification of the mass demonstrates multifocal extracellular crystalloid material exhibiting floret‐like arrangement with many 2 to 3 μm petals (P) that surround 30 μm elongated central core (C). Scale = 100 μm.
