Health condition · Clinically reviewed
Meningioma, from an incidental finding to a clear plan.
The most common primary brain tumour is usually slow-growing and often benign. Many are simply watched - here is how the decision gets made.
Why trust this guide
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Clinically reviewed
Written by our editorial team and reviewed by a registered UK clinician before publication.
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Sourced from guidance
Checked against NICE, SIGN and peer-reviewed neuro-oncology sources you can see at the end.
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Current for 2026
Reflects modern UK practice including active surveillance, Simpson grading and Gamma Knife pathways.
Key facts
Meningioma at a glance.
The essentials, in plain English - what it is, where it grows, and how it’s managed in the UK today.
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What it is
The most common primary intracranial tumour - arising from meningothelial cells of the arachnoid layer of the meninges, not from brain tissue itself.
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Grading
Predominantly benign (WHO Grade 1, around 80%), with atypical (Grade 2) and malignant/anaplastic (Grade 3) variants that behave more aggressively.
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Who it affects
Female predominance of roughly 2 to 3:1, with incidence rising steadily with age.
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Common locations
Convexity, parasagittal or falcine, sphenoid wing, olfactory groove, posterior fossa - and occasionally the spine.
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Often silent
A growing number are found incidentally on brain imaging done for an unrelated reason, causing no symptoms at all.
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Hormone-linked
Many express progesterone receptors, and growth can accelerate in pregnancy - relevant to contraception and HRT choices.
Why this guide matters
A finding, not automatically a crisis.
Hearing the word "brain tumour" is frightening, but most meningiomas behave very differently to how that phrase suggests. The three points below shape everything else on this page.
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Most are benign and slow
Around 80% are WHO Grade 1 - many never need treatment beyond periodic imaging.
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Watching is a valid strategy
Active surveillance with serial MRI is standard care for small, asymptomatic, incidentally found tumours.
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Location decides the plan
The same size tumour can mean very different things depending on whether it sits near the optic nerve, motor cortex or brainstem.
How the diagnosis is made
From a scan finding to a clear plan.
The steps a UK neurosurgical team will normally follow, in order - so you know what to expect and why.
Phase 1 · Assessing
Clinical review and imaging
Phase 2 · Confirming
MDT review and histopathology
Phase 3 · Preparing
Profiling and long-term follow-up
- 01
Assessing
Clinical assessment
A history of headache, seizures or focal symptoms, plus a full neurological examination - or no symptoms at all if picked up incidentally.
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Assessing
MRI brain with contrast
The gold-standard investigation - a specialist-commissioned scan looking for the characteristic dural tail enhancement sign.
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Confirming
CT head
Useful alongside MRI to show calcification within the tumour and hyperostosis (bone thickening) of the adjacent skull.
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Confirming
MDT neuro-oncology review
A specialist-commissioned multidisciplinary team weighs size, location, symptoms and growth on serial imaging before recommending a course of action.
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Confirming
Histopathology if resected
If surgery goes ahead, specialist-commissioned neuropathology confirms the WHO grade and subtype, guiding follow-up intensity.
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Preparing
Molecular and genetic profiling
Increasingly used alongside standard grading to refine prognosis and inform the follow-up plan - specialist commissioned.
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Preparing
Long-term surveillance planning
Whether treated or watched, a schedule of repeat MRI is agreed - closer together for higher-grade or incompletely resected tumours.
Typical timeline: from first MRI to an agreed plan within a few weeks.
Symptoms
What meningioma actually looks like.
Frequently nothing at all - but when symptoms appear, they trace directly back to where the tumour sits.
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No symptoms at all
Very common - an increasing number of meningiomas are found by chance on scans done for headaches, trauma or unrelated concerns.
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Headache
Often dull and progressive, sometimes worse in the morning - reflecting gradual mass effect rather than a sudden event.
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Seizures
Can be the first sign, particularly with convexity or parasagittal tumours that irritate the adjacent cortex.
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Visual disturbance
Blurred or reduced vision, or double vision, when the tumour involves the optic nerve or orbit - most often with sphenoid wing lesions.
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Loss of smell
Anosmia is characteristic of olfactory groove meningiomas, which sit at the base of the frontal lobes.
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Personality or mood change
Frontal lesions can bring subtle changes in behaviour, motivation or personality before any other sign appears.
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Focal neurological deficit
Weakness, numbness or coordination problems depending on exactly which part of the brain is compressed.
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Red flag - raised intracranial pressure
Persistent headache with vomiting, drowsiness or visual blurring in a large tumour needs urgent specialist assessment.
Treatment
How meningioma is treated in the UK.
From watchful waiting through to surgery and radiosurgery - the approach is matched to size, grade, location and symptoms.
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Active surveillance
Serial MRI monitoring for small, asymptomatic, incidentally found meningiomas - particularly appropriate in older patients. Specialist commissioned.
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Surgical resection
For symptomatic, growing or mass-effect tumours - aiming for complete removal, with the Simpson grading system used to predict recurrence risk. Specialist commissioned.
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Stereotactic radiosurgery
Gamma Knife treatment for small-to-medium tumours, surgically inaccessible sites, residual or recurrent disease, or patients unfit for surgery. Specialist commissioned.
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Fractionated radiotherapy
Used for larger tumours, atypical or malignant grade, or after incomplete resection - delivered over multiple sessions. Specialist commissioned.
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Anti-seizure medication
Started when seizures are part of the presentation, under specialist neurology guidance, and reviewed alongside any tumour treatment.
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Hormone considerations
Avoiding hormone replacement therapy and high-dose progesterone-containing contraception where possible, given the hormone sensitivity of many meningiomas.
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Post-treatment surveillance
Long-term follow-up imaging after surgery or radiotherapy, more frequent for higher-grade tumours given their greater recurrence risk.
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MDT-coordinated care
Neurosurgery, neuro-oncology and charity support (such as The Brain Tumour Charity) working together through diagnosis, treatment and follow-up.
What this guide is based on
The sources behind every claim on this page.
UK national guidance and specialist society standards, current at the time of last review.
Key references
Guidelines and standards we relied on.
A quiet reminder
This guide is for information, not medical advice.
Your neurosurgical or neuro-oncology team knows your scans and history and can tell you which parts apply to you. If in doubt, get seen.
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NICE. Brain tumours (primary) and brain metastases in adults (NG99).
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SIGN. Diagnosis and management of primary intracranial tumours.
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The Brain Tumour Charity. Meningioma information and support resources.
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European Association of Neuro-Oncology (EANO). Guideline on the diagnosis and treatment of meningiomas.
Red flags
When meningioma needs urgent attention.
Most meningiomas are managed calmly, on a planned timeline. These are the situations that aren’t - and where urgent specialist input is needed.
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New seizure
A first seizure in an adult always warrants urgent assessment and brain imaging, whatever the eventual cause turns out to be.
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Signs of raised intracranial pressure
Persistent headache with vomiting, drowsiness or visual disturbance suggests a large tumour and needs urgent specialist review.
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Rapid neurological decline
Sudden worsening of weakness, speech or consciousness needs emergency assessment - it may signal bleeding into the tumour or acute swelling.
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Progressive visual loss
Worsening vision, especially with a known sphenoid wing or optic nerve sheath meningioma, needs prompt ophthalmology and neurosurgical input.
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Growth on surveillance imaging
Any meningioma showing clear growth on serial MRI should prompt a change from watchful waiting to active treatment planning.
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Higher-grade histology
Atypical (Grade 2) or malignant (Grade 3) meningiomas carry a materially higher recurrence risk and need closer, longer-term follow-up.
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Pregnancy with a known meningioma
Hormone-driven growth can accelerate in pregnancy - specialist obstetric and neurosurgical liaison is advised.
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NF2-associated disease
Neurofibromatosis type 2 is linked with multiple meningiomas and other nerve sheath tumours, and needs coordinated genetic and neuro-oncology care.
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Spinal meningioma with cord signs
Limb weakness, sensory change or bladder and bowel disturbance from a spinal meningioma is a neurosurgical emergency.
Living with it
Usually watchable, sometimes treatable.
Four things that make the biggest difference after a meningioma diagnosis - understanding the plan, tracking your scans, raising hormone medicines early, and using the support that exists.
A quiet reminder
A slow-growing tumour deserves an unhurried plan.
There is nearly always time to get a second opinion, ask questions and understand your options fully before deciding on treatment.
- 01 Understand
A diagnosis is not automatically treatment
Many meningiomas are watched, not operated on. Being told you have one does not mean immediate surgery is needed.
- 02 Track
Keep every scan and report
A simple folder of MRI reports and dates makes it easy for any new specialist to see the growth pattern at a glance.
- 03 Ask
Raise hormone medicines proactively
Mention any meningioma before starting HRT or hormonal contraception - some options are best avoided or adjusted.
- 04 Support
Use specialist charity resources
The Brain Tumour Charity and similar organisations offer practical guidance and peer support alongside NHS care.
Frequently asked
Everything we get asked about meningioma.
Quick answers on grading, imaging, surveillance and treatment choices.
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What is a meningioma?
A meningioma is a tumour arising from the meningothelial cells of the meninges - the membranes covering the brain and spinal cord - rather than from brain tissue itself. It is the most common type of primary intracranial tumour, and around 80% are benign (WHO Grade 1).
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Is a meningioma cancer?
Most are not cancerous in the everyday sense - the majority are Grade 1 and grow slowly, if at all. A smaller proportion are atypical (Grade 2) or malignant/anaplastic (Grade 3), which grow faster and carry a higher risk of recurrence.
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Why was mine found only by chance?
Meningiomas are often asymptomatic, especially when small and slow-growing. As MRI and CT scanning have become more widely used for other reasons, incidental discovery has become increasingly common.
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Will I need surgery?
Not necessarily. Small, asymptomatic, incidentally found meningiomas are frequently managed with active surveillance and serial MRI, particularly in older patients. Surgery is generally reserved for symptomatic, growing, or mass-effect tumours.
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What is the dural tail sign?
It is a characteristic pattern of enhancement seen on contrast MRI, where the meninges adjacent to the tumour show a tapering line of enhancement. It is a strong supporting feature, though not unique to meningioma, in specialist neuroradiology reporting.
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Why does pregnancy or HRT matter?
Many meningiomas express progesterone receptors, and hormonal factors can influence growth. Growth can accelerate in pregnancy, and specialists generally advise avoiding hormone replacement therapy or high-dose progesterone-containing contraception where possible.
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Hydrocephalus
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Microcephaly
A related paediatric neurological condition.
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Dizziness
A symptom that can point to neurological causes.
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Brain Tumour Surgery
How surgical resection is planned and performed.
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Gamma Knife Radiosurgery
Stereotactic treatment for inoperable tumours.
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Private MRI Scan
The gold-standard imaging for diagnosis.
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