Fifteen cases had a CS under 0.9 with v12.5 for the following MC: glioblastoma, IDH-wildtype, RTK2 or mesenchymal subtypes (6 cases), ganglioglioma (5 cases), dysembryoplastic neuroepithelial tumor (1 case), infantile hemispheric glioma (1 case), rosette forming glioneuronal tumor (1 case), myxoid glioneuronal tumor, PDGFRA-mutant (novel) (1 case). The gene discussed is PDGFRA; the disease is ganglioglioma.