AstrocytomaBrain NeoplasmsGlioblastomaGliomaImmunohistochemistryOligodendrogliomaHypothalamic NeoplasmsSupratentorial NeoplasmsSpinal Cord NeoplasmsTumor Markers, BiologicalOptic Nerve NeoplasmsEpendymomaCell Line, TumorBrain Stem NeoplasmsCentral Nervous System NeoplasmsMeningiomaCerebellar NeoplasmsTumor Necrosis Factor-alphaTumor BurdenTumor Suppressor Protein p53NimustineNeoplasm GradingMeningeal NeoplasmsAstrocytesGenes, Tumor SuppressorTumor Suppressor Proteins