OligodendrogliomaChromosomes, Human, Pair 19Chromosomes, Human, Pair 1AstrocytomaBrain NeoplasmsLomustineGliomaLoss of HeterozygosityChromosome DeletionPrognosisNervous System NeoplasmsIsocitrate DehydrogenaseEpendymomaDNA Modification MethylasesChromosomes, Human, Pair 10ProcarbazineCentral Nervous System NeoplasmsSupratentorial NeoplasmsGlioblastomaIn Situ Hybridization, FluorescenceDNA Repair EnzymesGlial Fibrillary Acidic Protein