GENE-13. GENOMIC AND RADIOMIC LANDSCAPE OF IDH WILDTYPE-TERT PROMOTER MUTATION IN LOWER-GRADE GLIOMAS
Abstract BACKGROUND Recently, a rare subset of lower grade glioma (LoG), characterized by wild-type isocitrate dehydrogenase (IDH) and mutated TERT promoter (IDHWT-TERTpMut), has been highlighted for its dismal clinical behavior and classified as world health organization (WHO) grade IV. METHODS We examined this distinct tumor subset through genome-wide analysis of 745 gliomas and radiomic analysis of 129 LoGs. RESULTS We found that the prognosis and genetic lineage of IDHWT-TERTpMut LoGs were similar to those of glioblastoma. Importantly, a signature of 7 radiomic features from magnetic resonance imaging data differentiated IDHWT-TERTpMut LoGs from other LoGs. In addition, we found the radiomic related genes involved in many tumorigenic processes. CONCLUSIONS Overall, our findings suggest that the biological characteristics of IDHWT-TERTpMut LoGs and the radiomic signature could help in the non-invasive diagnosis of this tumor subtype.