Metastatic Meningioma: A systematic review of incidence and risk factors

•Metastasis is a rare complication of intracranial meningiomas.•Multiply recurrent disease, high-grade, and non-skull base location are clinical risk factors for metastasis.•Male sex, scalp invasion, and sinus invasion may be risk factors for metastasis but require further validation.•There are no current molecular associations for metastasis in meningioma, but given the association with multiply recurrent disease, molecular risk factors for progression should be characterized in future studies.