Among the 72 cases of astrocytic tumors of various WHO grades, the average expression scores of Nrf2 were 19.29 in pilocytic astrocytomas, 75.98 in diffuse astrocytomas, 114.00 in anaplastic astrocytomas, 160.56 in glioblastomas multiforme, and 42.50 in gliosarcomas (Table 2, Figure 3). This evidence concerns the gene NFE2L2 and diffuse astrocytoma.