IDH1 and astrocytoma (excluding glioblastoma): GU-LGG-93 was diagnosed as astrocytoma IDH-wildtype, WHO (2016) grade III but, with additional molecular data generated in this research study (EGFR amplification and copy number variations of chromosomes 7 and/or 10), the tumor was designated as a glioblastoma IDH-wildtype, CNS WHO grade 4 according to WHO 2021 criteria.