Box plots showing the distribution of Ki-67/MIB-1 PIs among the glioma subtypes. PILOCYT: Pilocytic astrocytoma, A: Diffuse astrocytoma, OA: Oligoastrocytoma, O: Oligodendroglioma, AA: Anaplastic astrocytoma, AOA: Anaplastic oligoastrocytoma, AO: Anaplastic oligodendroglioma, GBM: Glioblastoma, SUBEP: Subependymoma and EP: Ependymoma.