Fig. 2

HE staining and immunohistochemical staining: A-Perineuronal rosettes or pseudorosettes formed by neurons around the neurofibrillary tangles were observed more clearly or formed around the blood vessels; E, The display of a mucoid matrix was similar to an area of dysembryoplastic neuroepithelial tumor (DNET); F, Microvascular proliferation was observed; G-H, Some areas bore semblance to pilocytic astrocytoma; I, The central neuropil components of the rosette-like structures around the neuropil or the pseudorosette structures of the perivascular regions expressed Syn; J, S-100 expression was present in the glial components; K, GFAP was expressed in the glial components; L, The cells around the rosettes were observed to express Olig2 but did not express GFAP. GFAP and S-100 were expressed in the glial components