There was 1/77 HGG without enhancement but with positive status of EGFR amplification, thus diagnosed as glioblastomas, IDH-wildtype, while there were 32/45 LGGs with enhancement diagnosed as oligodendrogliomas, IDH-mutant and 1p/19q-deleted (n = 15) and astrocytoma, IDH-mutant (n = 17). Here, IDH1 is linked to astrocytoma (excluding glioblastoma).