papillary glioneuronal tumor (MONDO_0016735, a Monarch Disease Ontology identifier) is a WHO grade I, indolent and relatively circumscribed brain tumor. Morphologically it is characterized by the presence of astrocytes that line vascular and hyalinized pseudopapillae. In between the pseudopapillae aggregates of neurocytes, large neurons, and ganglioid cells are present. Also known as: PGNT, papillary glioneuronal tumor (WHO grade I), papillary glioneuronal tumour (WHO grade I), pseudopapillary ganglioglioneurocytoma, pseudopapillary neurocytoma with glial differentiation.