Whether Ki-67 PI provides prognostic information across subgroups defined by both WHO grade and extent of resection remains to be investigated.<h4>Methods</h4>We analyzed 5,050 patients with intracranial meningiomas from the international PERNS cohort (42 centers, diagnosed between 1989-2019) who underwent surgical resection without postoperative radiotherapy. The gene discussed is MKI67; the disease is intracranial meningioma.