Diffuse Low Grade Glioma, FGFR1-Mutant

**Semantic type:** Neoplastic Process

**Definition:** Diffuse low-grade glioma characterized by FGFR1 gene mutations, an internal tandem duplication within the FGFR1 gene or the presence of an FGFR1 fusion gene.

**Synonyms:** - Diffuse Low-Grade Glioma, FGFR1-Mutant