MKI67 and meningioma: As the immunohistochemical technique used here is an economical, quick, and easy-to-use method, in comparison with other methods, such as mRNA quantification or DNA methylome, we suggest that Ki-67, MCM6 immunohistochemical staining can be applicable by the pathologist in daily practice, at the initial diagnosis, on formalin-fixed tissue blocks to efficiently and rapidly identify the high risk meningiomas.