Pathology demonstrated a CNS WHO grade 2 atypical meningioma with increased mitotic figures, loss of architecture with sheet-like growth pattern and hypercellular, macronucleoli, >4 mitoses per 10 high-power fields (HPF) (>2.5 mitoses per mm2), and elevated immunohistochemical (IHC) staining for Ki67 (Figure 1b). Here, MKI67 is linked to meningioma.