(a) pseudopapillae structures composed of hyalinized blood vessels and surrounded by glioneuronal cells. Papillary glioneuronal tumor may mimic vascular malformation. Hematoxylin-eosin stain. Original magnification ×100. (b) the glial component around blood vessels. Glial fibrillary acidic protein (GFAP). Original magnification ×400. (c) neuronal component in the interpapillary area. NeuN immunostain. Original magnification ×200.
