Papillary Glioneuronal Tumor

**Semantic type:** Neoplastic Process

**Definition:** A WHO grade 1, 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.

**Synonyms:** - PGNT - Papillary Glioneuronal Tumor (WHO Grade 1) - Papillary Glioneuronal Tumor (WHO Grade I) - Papillary glioneuronal tumor