Fig. 5From: Clinical significance of NF2 alteration in grade I meningiomas revisited; prognostic impact integrated with extent of resection, tumour location, and Ki-67 indexClassifications of WHO grade I meningioma with GTR. “Good”: Ki-67 index < 4 and non-NF2 meningioma, Ki-67 index < 4 and “Infratentorial NF2”; Intermediate: MIB-1 index ≥ 4 or “Supratentorial NF2”; Poor: Ki-67 index ≥ 4 and “Supratentorial NF2”Back to article page