MGMT and oligodendroglioma: Conversely, categories like oligoastrocytomas and oligodendrogliomas, grade 2, IDH mutant, codel 1p19q, methylated MGMT promoter, no combined copy number alterations, no expression of TERT, ATRX mutant, and PN and NE transcriptome subtypes are closely associated with alive vital status, appearing along the negative x-axis (dimension 1) (Figure 2).