PBX3 and oligoastrocytoma: There were GBM, astrocytoma, oligoastrocytoma and oligodendroglioma histological types from TCGA databases, the expression of PBX3 was highest in GBM, followed by astrocytoma, and the expression of PBX3 in oligoastrocytoma and oligodendroglioma was significantly lower than that of GBM and astrocytoma (Fig 1G).