Kaplan-Meier curves and recurrence-free survival (RFS).

Meningioma patients were stratified by optimal cutoff values revealed by receiver operator characteristics (ROC). Histopathological grade (A), MIB-1 PI (B), topoisomerase IIα (C), and mitosin (D). Topoisomerase IIα and mitosin expression were demonstrated to be predictors of RFS, but no association was found with histopathological grade or MIB-1.