The diagnoses included 3 pilocytic astrocytomas, 1 diffuse low-grade glioma, MAPK pathway-altered, 1 polymorphous low-grade neuroepithelial tumor of the young, 1 astroblastoma, MN1-altered, 1 desmoplastic infantile astrocytoma, and 1 diffuse leptomeningeal glioneuronal tumor. Here, MN1 is linked to neuroepithelial neoplasm.