The averages for cell count staining SSEA4+Olig2+, Nestin−Ki67+, or CD133−Sox+ were also higher in grade II/III meningiomas (Brown–Forsythe ANOVA, P < 0.05), while the average for the number of CD133+Sox+ cells decreased in grade II/III compared to grade I meningiomas (Brown–Forsythe ANOVA, P < 0.05). This evidence concerns the gene PROM1 and meningioma.