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A meningioma diagnosis sounds frightening, but most are benign and slow-growing. Many are simply monitored. We help you understand what your scan means and what to do next.
A meningioma is a tumour that grows from the meninges — the thin protective membranes that wrap around your brain and spinal cord. Importantly, it does not grow from brain tissue itself. It is the most common primary brain tumour, and for most people it is slow-growing and non-cancerous.
Because meningiomas grow slowly, many are discovered by accident — on a scan done for headaches, a head injury, or an unrelated reason. Finding one can be alarming, but a meningioma is a very different situation from an aggressive brain cancer such as a glioma or glioblastoma. This page explains what a meningioma is, whether it is cancer, its symptoms, and how it is treated at CION.
Meningiomas are the most common primary brain tumour, accounting for roughly one-third of all primary brain and central nervous system tumours, and around 80% are benign WHO Grade 1 tumours (source: WHO Classification of Tumours of the Central Nervous System, 2021; NCCN Central Nervous System Cancers Guidelines). Because they arise from the coverings of the brain rather than brain tissue, many never cause symptoms.
Usually, no. The great majority of meningiomas are benign — meaning they grow slowly, stay in one place, and do not spread to other organs the way cancers do. But "benign" does not always mean "harmless": a meningioma in a tight or critical spot can still press on the brain and cause symptoms, so it is watched or treated even when it is not cancer.
Meningiomas are graded by the World Health Organization (WHO) from Grade 1 to Grade 3, and the grade — not a cancer "stage" — decides how they behave and how they are managed:
About 80% of meningiomas. Slow-growing and non-cancerous. Often just monitored; when treatment is needed, surgery or radiosurgery usually controls them well.
Around 15–18%. Faster-growing and more likely to come back. Usually treated with surgery, often followed by radiation, and closer follow-up.
Rare (roughly 1–3%). These are true cancers (anaplastic meningioma) — aggressive and needing surgery plus radiation and careful monitoring.
Only a pathologist examining the tissue can confirm the grade. To understand what each grade means for your outlook and treatment, see our detailed guide on meningioma grades and when a meningioma is atypical or malignant.
Most small meningiomas cause no symptoms at all and are found by chance. When symptoms do appear, they come from the tumour gently pressing on nearby brain tissue, nerves, or blood vessels — so they depend entirely on where the tumour sits. The same symptoms are far more often caused by ordinary, benign problems like tension headaches, migraine, stress, or ageing eyes.
What matters is a symptom that is new, persistent, and slowly getting worse. Possible signs include:
Reassurance and a red flag together: a headache alone is very rarely a meningioma. But a first adult seizure, or one-sided weakness or vision loss that is new and progressive, should be checked promptly. Speak to a CION specialist if these describe you or someone you love.
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Whether your scan was a surprise finding or you have symptoms, our neuro-oncology team will explain your options — monitoring, surgery, or radiosurgery — in plain language.
The single most useful test is an MRI of the brain with contrast. Meningiomas often have a very recognisable appearance — a well-defined mass attached to the meninges, sometimes with a characteristic "dural tail." MRI shows the exact size, location, and how the tumour relates to nearby nerves and blood vessels, which is what guides the plan.
At CION, your imaging and any pathology are reviewed by a multidisciplinary neuro-oncology tumour board before any recommendation is made — so the advice you receive reflects surgical, radiation, and medical oncology perspectives together, not one specialist in isolation. Molecular testing may be arranged when it will genuinely change management.
Because so many meningiomas are slow-growing and low-risk, international guidelines (NCCN Central Nervous System Cancers; European Association of Neuro-Oncology, EANO) explicitly support active surveillance — watching a small, symptom-free meningioma with periodic MRI rather than rushing to treatment. Many people live for years with a stable meningioma that never needs an operation.
There is no single "right" treatment for every meningioma. The best choice depends on the tumour's grade, size, and location, your symptoms, your age, and your overall health. The main options are:
For a small meningioma that is not causing symptoms, the safest step is often to do nothing but watch it with repeat MRI scans over time. Many benign meningiomas grow so slowly that they never need treatment. This avoids the risks of surgery or radiation when they are not necessary.
When a meningioma is growing, causing symptoms, or sits in a worrying spot, surgical removal is often the treatment of choice — and complete removal can cure many benign meningiomas. CION's panel does not include a neurosurgeon, so all meningioma surgery is coordinated with accredited neurosurgical partners. Our team plans the case with them, manages your medical and supportive care throughout, and arranges pathology so the grade is confirmed and follow-up is seamless.
Stereotactic radiosurgery delivers finely focused radiation to the tumour without any incision — useful for smaller meningiomas, tumours in hard-to-reach locations, or any tumour left behind after surgery. Larger tumours or higher-grade meningiomas may instead receive fractionated radiation therapy (small daily doses over several weeks). CION delivers precision radiation (IMRT/IGRT) directly and coordinates specialist radiosurgery as part of your plan.
For most people with a benign Grade 1 meningioma, the outlook is reassuring. When the tumour is completely removed, it recurs infrequently, and many people return to normal life. Because any meningioma can occasionally regrow, long-term MRI follow-up is standard for every grade — so if anything changes, it is caught early.
Higher-grade meningiomas — atypical (Grade 2) and malignant (Grade 3) — are more likely to come back, so they usually involve radiation after surgery and closer monitoring. Our detailed meningioma grades guide walks through what each grade means for recurrence and prognosis. For the full treatment pathway — surgery coordination, radiation, and follow-up — see our meningioma treatment page, part of our broader brain tumour treatment programme in Hyderabad.
When to get a second opinion: a meningioma diagnosis rarely needs to be treated as an emergency, which makes it an ideal situation to pause and get a second opinion — especially before agreeing to surgery, or if you have been told to "just monitor" but feel unsure. Bring your MRI and any reports and request a free written second opinion, or call 18002028726 to talk it through.
Get a free written second opinion from CION's neuro-oncology tumour board — especially helpful before deciding on surgery for a meningioma.
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Start Your Story. Book Free Consultation.Most meningiomas are not cancer. About 8 in 10 are WHO Grade 1 — benign, slow-growing tumours that arise from the meninges (the membranes covering the brain), not from brain tissue itself. Because they are benign, they do not spread to other organs the way cancers do. A smaller group are Grade 2 (atypical) and a rare few are Grade 3 (malignant/anaplastic), which behave more like cancer and are more likely to recur. Only your pathology report — after surgery or biopsy — confirms the grade. You can read more about how the grade changes the outlook on our meningioma grades page.
No. Many small meningiomas found by chance on a scan cause no symptoms and are simply watched with periodic MRI — an approach called active surveillance. Treatment is usually recommended when the tumour is growing, pressing on important structures, or causing symptoms such as seizures, vision changes, or weakness. Options then include surgery (coordinated with accredited neurosurgical partners) or stereotactic radiosurgery for smaller or hard-to-reach tumours. The right choice depends on size, location, your age, and your overall health. A neuro-oncology tumour board reviews each case before advising.
Because meningiomas grow slowly, many cause no symptoms at all and are found incidentally. When symptoms do appear, they depend on where the tumour sits and what it presses on. Common ones include a new or changing headache, a first-ever seizure in an adult, gradual vision changes, hearing changes, weakness or numbness on one side, or subtle changes in memory and personality. These symptoms are far more often caused by benign, everyday problems — but new, persistent and progressive symptoms should always be checked with a brain MRI.
Meningiomas are the most common primary brain tumour, and risk rises with age. They are roughly twice as common in women as in men. The strongest known risk factor is previous radiation to the head. Most meningiomas are not hereditary, but a rare inherited condition called neurofibromatosis type 2 (NF2) raises the risk and can cause multiple meningiomas. Having one meningioma does not usually mean your children will develop one. If several family members have had brain or nerve tumours, genetic counselling can help clarify your personal risk.
It can, and the chance depends mainly on the grade and how completely it was removed. Benign Grade 1 meningiomas that are fully removed recur infrequently. Grade 2 (atypical) and Grade 3 (malignant) meningiomas recur more often and usually need radiation after surgery plus closer follow-up. When a tumour cannot be removed completely — for example if it wraps around a blood vessel or nerve — the remaining part is watched with MRI or treated with radiation. Long-term imaging follow-up is standard for all grades so any regrowth is caught early.
Diagnosis begins with an MRI of the brain with contrast, which is the best scan for showing a meningioma's size, location, and relationship to nearby structures. Meningiomas often have a very typical appearance on MRI. Sometimes a CT scan is added to check for calcium or bone involvement. The definitive grade can only be confirmed by examining tissue under a microscope, obtained during surgery. At CION, imaging and pathology are reviewed by a multidisciplinary neuro-oncology team, and molecular testing may be arranged when it will change management.
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