Primary objective

• To externally validate the prognostic model IMPACT

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Secondary objectives

• To determine the growth patterns of incidental meningiomas

• To examine the MRI and pathology features of meningiomas subject to surgical resection

• To determine the risk of post-intervention complications and tumour recurrence/growth for meningiomas subject to surgery, stereotactic radiosurgery, or fractionated radiotherapy

• Assess the economic implications of stratifying follow-up according to risk of disease
  progression