Meningioma: observation, surgery or radiosurgery?

What is a meningioma?

A meningioma usually develops from the membranes surrounding the brain or spinal cord. Many grow slowly and are found incidentally on scans. Nevertheless, they vary in grade and behaviour, so location, symptoms and growth over time guide decisions.

When may monitoring be best?

Small, symptom-free, stable meningiomas can often be monitored with periodic MRI. Treating every lesion immediately may expose people to risk without clear benefit. The monitoring schedule depends on the tumour and the individual.

When are surgery and radiosurgery considered?

Surgery may be appropriate when a tumour grows, causes symptoms or presses on important structures, and also allows tissue analysis. Radiosurgery may be considered for selected small, well-defined tumours or after surgery. If the tumour is larger or close to the optic nerves or other sensitive structures, radiation delivered over several sessions may be more appropriate.

Does the tumour grade matter?

Yes. Pathology findings help determine the risk of recurrence and follow-up. Higher-grade or recurrent meningiomas more often require radiotherapy as part of treatment. Not every meningioma is malignant, and not every meningioma needs radiosurgery.

Risks and follow-up

Possible side effects include swelling and effects on nearby nerves or functions, depending on the area treated. Tumour control is assessed by MRI over months and years. Ask which changes would justify treatment now and what outcomes are realistic.