Rosette-Forming Glioneuronal Tumor

**Semantic type:** Neoplastic Process

**Definition:** A central nervous system neoplasm mostly occurring in the fourth ventricle region. It is characterized by the presence of neurocytes forming pseudorosettes and astrocytes which contain Rosenthal fibers. Cytologic atypia is minimal.

**Synonyms:** - RGNT - Rosette-forming glioneuronal tumor