Meningioma

Meningioma is a tumor that develops from the meninges, the protective membranes surrounding the brain and spinal cord. Many meningiomas grow slowly and are non-cancerous, but they can still cause symptoms by pressing on nearby brain, nerve or spinal structures.

Overview

Meningioma is a tumor that arises from the meninges, the thin layers of tissue that cover and protect the brain and spinal cord. Although it is often called a brain tumor when it occurs inside the skull, it usually begins in the lining around the brain rather than in the brain tissue itself. Meningiomas can also develop along the spinal cord.

Most meningiomas grow slowly and are classified as benign, meaning they are not cancerous in the usual sense. However, even a benign meningioma can become medically important if it presses on the brain, optic nerves, cranial nerves, blood vessels or spinal cord. A smaller number of meningiomas are atypical or malignant, which means they may grow faster, invade nearby tissues or come back more often after treatment.

The effect of a meningioma depends greatly on its size, growth rate and location. Some are found incidentally during imaging for another reason and may not cause symptoms for years. Others cause neurological symptoms that develop gradually and need specialist evaluation by neurology, neurosurgery, neuroradiology and sometimes radiation oncology teams.

Symptoms

Meningioma symptoms vary because different areas of the brain and spinal cord control different functions. Many symptoms develop slowly, which can make them easy to mistake for stress, aging, eye problems, migraine or other conditions. Some people have no symptoms at all, and the tumor is discovered during an MRI or CT scan performed for another medical reason.

Possible symptoms of a brain meningioma include persistent or changing headaches, seizures, blurred or double vision, hearing loss, ringing in the ear, loss of smell, memory problems, changes in concentration, speech difficulties, weakness, numbness or balance problems. A meningioma near the frontal lobes may affect mood, behavior or decision-making, while one near the optic nerves may mainly affect vision.

Spinal meningioma may cause back pain, numbness, tingling, weakness in the arms or legs, difficulty walking or changes in bladder or bowel control. These symptoms can also occur with many other conditions, so medical assessment is important. The presence of symptoms does not automatically mean that a tumor is aggressive, but it does mean that location and pressure effects should be assessed carefully.

Causes & Risk Factors

The exact cause of most meningiomas is not known. A meningioma begins when cells in the meninges develop genetic changes that allow them to multiply more than they should. In most people, this happens without a clearly identifiable trigger and is not caused by anything they did or did not do.

Several factors are associated with a higher risk. Meningiomas are more common in adults and are diagnosed more often in women than in men. Previous radiation exposure to the head, especially at a young age, can increase risk. Certain inherited conditions, particularly neurofibromatosis type 2, are also linked with a higher chance of developing meningiomas, sometimes more than one.

Hormonal influences may play a role in some cases because many meningiomas have hormone receptors, but this relationship is complex and does not mean hormones are the only cause. A family history of meningioma is uncommon, but people with known genetic syndromes or multiple tumors may benefit from specialist genetic counseling. Most meningiomas cannot be prevented, so early evaluation of new neurological symptoms and appropriate monitoring are the most practical steps.

Diagnosis

Diagnosis of meningioma usually begins with a medical history and neurological examination. The doctor may ask about headaches, seizures, vision or hearing changes, limb weakness, balance, memory, speech, mood and how symptoms have changed over time. The examination may check reflexes, strength, sensation, coordination, walking, eye movements and cranial nerve function.

Magnetic resonance imaging, or MRI, is commonly the key imaging test because it provides detailed pictures of the brain, meninges, nerves and surrounding structures. Contrast material may be used when appropriate to help show the tumor’s borders and relationship to nearby tissues. CT scanning may also be useful, especially to assess bone involvement or calcification, or when MRI is not possible.

Imaging can strongly suggest a meningioma, but final confirmation of tumor type and grade may require examination of tissue removed during surgery or biopsy. Pathology results help classify the tumor and guide decisions about follow-up or additional treatment. In selected cases, doctors may also use vascular imaging, visual field testing, hearing tests or other assessments depending on the tumor’s location.

Treatment Options

Meningioma treatment is individualized. The right approach depends on the tumor’s size, location, growth rate, grade, symptoms, the person’s age and general health, and whether the tumor is close to critical structures such as major blood vessels, optic nerves, the brainstem or the spinal cord. A specialist decides the safest and most appropriate plan after full assessment and discussion with the patient.

For small, slow-growing meningiomas that are not causing symptoms, active monitoring may be recommended. This usually means regular clinical reviews and repeat imaging to check whether the tumor is stable or growing. Monitoring is an active medical plan, not ignoring the condition, and it can help avoid unnecessary treatment when the risks of intervention outweigh the expected benefit.

Surgery may be considered when a meningioma is causing symptoms, growing, pressing on important structures, or when tissue diagnosis is needed. The aim is often to remove as much of the tumor as safely possible while protecting neurological function. Complete removal may not always be safe if the tumor is attached to vital nerves, blood vessels or deep brain structures; in those situations, partial removal followed by observation or radiotherapy may be considered.

Radiotherapy, including highly focused techniques in selected cases, may be used for tumors that cannot be fully removed, tumors in difficult locations, recurrent tumors or higher-grade meningiomas. Medicines may be used to control symptoms such as seizures, swelling-related symptoms or pain, but drug treatment alone is not usually the main curative approach for meningioma. Rehabilitation, including physiotherapy, occupational therapy, speech therapy or neuropsychological support, may help recovery when movement, balance, speech, thinking or daily function has been affected.

Living With / Prognosis

The outlook for meningioma varies widely and is strongly influenced by tumor grade, location, completeness of removal, growth behavior and the person’s neurological condition before treatment. Many people with benign meningiomas live well for many years, especially when the tumor is stable or can be treated safely. Some people need only monitoring, while others require surgery, radiotherapy or long-term follow-up.

Living with a meningioma often means attending scheduled MRI scans and clinic visits, even after successful treatment. Follow-up helps doctors detect growth or recurrence early and manage symptoms promptly. It is helpful for patients to keep a record of symptoms, scan dates, treatments and any changes in medications or daily function.

Recovery after treatment can be gradual. Fatigue, headaches, concentration changes, weakness, balance problems or emotional adjustment may improve over time, but some people need rehabilitation or psychological support. Good sleep, safe physical activity approved by the care team, management of other health conditions and adherence to follow-up appointments can support recovery and quality of life.

International patients may benefit from coordinated care where neurology, neurosurgery, neuroradiology, radiation oncology, pathology and rehabilitation specialists work together. Acibadem International’s multidisciplinary teams and JCI-accredited hospitals diagnose and treat meningioma for international patients, with care plans based on individual assessment.

When to See a Doctor

A doctor should be consulted for persistent or worsening headaches, new seizures, unexplained weakness or numbness, changes in vision or hearing, balance problems, memory difficulties, personality changes or new speech problems. These symptoms can have many causes, but neurological evaluation is important when they are new, progressive or interfere with daily life.

Urgent medical care is needed for a first seizure, sudden weakness on one side of the body, sudden vision loss, severe confusion, loss of consciousness, severe sudden headache, or new problems with bladder or bowel control accompanied by limb weakness or numbness. These symptoms may indicate pressure on the brain or spinal cord or another emergency condition that needs prompt assessment.

People already diagnosed with meningioma should contact their care team if symptoms change between follow-up visits, if seizures occur, or if headaches, vision, walking, strength or thinking worsen. They should also keep scheduled imaging appointments even if they feel well, because tumor growth can sometimes occur before obvious symptoms appear.

Frequently asked questions

Is a meningioma a brain cancer?

Most meningiomas are not brain cancer. They usually arise from the meninges, the coverings of the brain and spinal cord, and many are benign and slow-growing. However, some meningiomas are atypical or malignant, and even benign tumors can cause serious symptoms if they press on important structures.

Can a meningioma be left untreated?

Some small meningiomas that are not causing symptoms can be safely monitored with regular imaging and specialist review. This approach is often called active surveillance or watchful waiting. It is appropriate only after a doctor assesses the tumor’s size, location, growth pattern and the patient’s overall health.

What are the most common meningioma symptoms?

Common symptoms include headaches, seizures, vision changes, hearing problems, weakness, numbness, balance difficulties, memory problems or changes in behavior. Symptoms depend on where the tumor is located. Some meningiomas cause no symptoms and are found incidentally on imaging.

How is meningioma diagnosed?

Meningioma is usually diagnosed with neurological examination and imaging, especially MRI. CT scanning may also be used in some cases. Tissue analysis after biopsy or surgery can confirm the diagnosis and determine the tumor grade.

Does every meningioma need surgery?

No, not every meningioma needs surgery. Surgery may be recommended when the tumor is growing, causing symptoms, or needs tissue diagnosis, but monitoring or radiotherapy may be better in selected situations. The safest option is decided by a specialist team after reviewing the individual case.

Can a meningioma come back after treatment?

Yes, some meningiomas can recur after treatment, especially if they are higher grade or cannot be completely removed safely. This is why follow-up MRI scans and clinic visits are important. The follow-up schedule depends on the tumor grade, treatment type and the patient’s condition.

What type of specialist treats meningioma?

Meningioma care is usually led by neurosurgeons and neurologists, with input from neuroradiologists, pathologists and radiation oncologists when needed. Rehabilitation specialists may also help if symptoms affect movement, speech, cognition or daily activities. A multidisciplinary approach helps match treatment to the tumor and the patient’s goals.

References

• World Health Organization
• National Cancer Institute
• American Association of Neurological Surgeons
• European Association of Neuro-Oncology
• Mayo Clinic

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.