Meningiomas are the most common primary brain tumors, accounting for about one-third of such tumors, and they primarily affect adults, especially women1 2. These tumors arise from the meninges, the protective membranes surrounding the brain and spinal cord, and often grow slowly over many years without causing symptoms3 4. However, when meningiomas enlarge, they can compress nearby brain tissue or nerves, leading to a variety of neurological and psychiatric symptoms5 6. Understanding these symptoms is crucial for early detection and treatment.
Common Neurological Signs
Meningiomas cause symptoms mainly by compressing adjacent brain structures due to the limited space inside the skull5 . This compression can lead to a range of neurological signs depending on the tumor’s size and location6 .
Seizures
Seizures are a frequent presenting symptom in patients with meningiomas, caused by irritation of the cerebral cortex5 . Both focal (partial) and generalized seizures can occur:
- Focal seizures begin in a specific brain area and produce localized motor or sensory symptoms7 8.
- Generalized seizures involve both sides of the brain, often leading to loss of consciousness7 .
- Mixed seizure types, including both focal and generalized seizures, have also been reported in meningioma patients8 .
Seizures during pregnancy or first-time seizures require urgent medical attention due to potential complications7 .
Dementia
Cognitive decline, including memory impairment and executive dysfunction, can result from meningioma-induced brain compression9 . Symptoms resembling dementia may appear, especially with tumors in frontal brain regions9 . Importantly, these cognitive symptoms may improve following effective tumor treatment9 .
Muscle Changes
Muscle weakness and spasticity may develop when meningiomas compress brain areas or the spinal cord responsible for motor control10 . Signs of upper motor neuron involvement, such as clonus (rhythmic muscle contractions), can also be present5 .
Sensory Changes
Sensory deficits, including numbness or altered sensation, may occur due to tumor pressure on sensory pathways or cranial nerves5 . Visual disturbances, such as blurred vision or double vision, are common when tumors affect the optic pathways or adjacent structures11 .
- Headaches, dizziness, seizures, and muscle weakness are common symptoms across meningioma types12 .
Personality and Behavioral Changes
Meningiomas, particularly those located in the frontal lobes, can cause significant changes in personality and behavior due to their impact on brain regions involved in cognition and emotion13 14.
Psychological Symptoms
Neuropsychiatric symptoms may be the first or only manifestation of meningioma, sometimes preceding classic neurological signs9 15. These symptoms include:
- Depression, often linked to frontal lobe tumors, characterized by loss of interest (anhedonia) and reduced engagement in hobbies13 .
- Mania and hallucinations have been reported in some cases13 15.
- Anxiety and psychosis may also occur, depending on tumor location15 .
- Sudden personality changes, disinhibition, apathy, or abulia can result from tumors in specific frontal regions14 15.
Psychiatric symptoms without neurological signs may delay diagnosis, underscoring the importance of neuroimaging in atypical psychiatric presentations9 15.
Psychiatric symptoms can sometimes be the sole presenting feature of meningioma. Physicians should maintain a high index of suspicion in patients presenting with atypical psychiatric symptoms, sudden personality changes, or lack of response to standard treatments15 .
Meningioma Symptoms in Children
Pediatric meningiomas are rare and differ clinically from adult cases, with no significant sex predilection16 17. Symptoms in children often reflect increased intracranial pressure and focal neurological deficits16 .
Common signs in children include:
- Headaches, vomiting, and visual disturbances due to elevated intracranial pressure16 .
- Optic disc swelling (papilledema), a key sign of raised intracranial pressure in pediatric patients16 .
- Focal neurological signs such as weakness or sensory changes depending on tumor location16 .
The mean age of diagnosis in pediatric cases is around early adolescence, though infant cases are rare17 .
Meningioma Symptoms in Women
Women are more frequently affected by meningiomas than men, with a female-to-male ratio of about 2 to 3 during reproductive years2 . Hormonal influences, especially progesterone, play a significant role in tumor growth and symptom development2 .
Key points include:
- Pregnancy can accelerate meningioma growth due to elevated progesterone levels, worsening symptoms2 .
- Common symptoms in women include motor weakness, sensory deficits, visual disturbances, and seizures5 .
- Pediatric meningiomas show no sex predilection, unlike adult cases17 .
Hormonal receptor expression in meningiomas may explain these sex-related differences and the impact of pregnancy on tumor behavior2 .
When to See a Doctor
Early medical evaluation is essential when symptoms suggestive of meningioma appear18 . Prompt consultation is advised for neurological symptoms such as:
- New or worsening headaches and visual disturbances5 .
- Muscle weakness or motor difficulties5 .
- First-time seizures or seizures occurring during pregnancy7 .
Emergency care should be sought if seizures are prolonged (lasting more than five minutes), cause trauma, respiratory distress, or occur in succession (status epilepticus), as these are neurological emergencies7 .
Treatment decisions depend on tumor size, location, and symptom severity, highlighting the importance of timely diagnosis19 .
Meningiomas are the most common primary brain tumors, often growing slowly and sometimes discovered incidentally during imaging for unrelated issues3 4.
Pediatric meningiomas are rare and often present with symptoms of increased intracranial pressure such as headaches and papilledema16 17.
Key Symptom Summary
- Headaches, often worsening over time, are a common early symptom5 3.
- Seizures, both focal and generalized, frequently present due to cortical irritation5 8.
- Cognitive and personality changes, especially with frontal lobe tumors, can manifest as depression, mania, or psychosis9 1315.
- Muscle weakness, spasticity, and sensory deficits arise from brain or spinal cord compression5 10.
- Visual disturbances and papilledema indicate increased intracranial pressure, particularly in children16 11.
| Symptom Category | Common Signs and Mechanisms | Source(s) |
|---|---|---|
| Seizures | Focal and generalized seizures due to cortical irritation | 578 |
| Cognitive Decline | Memory impairment, executive dysfunction from brain compression | 913 |
| Muscle Changes | Weakness, spasticity, clonus from motor pathway involvement | 510 |
| Sensory Changes | Numbness, visual disturbances from nerve compression | 511 |
| Psychiatric Symptoms | Depression, mania, hallucinations linked to frontal tumors | 1315 |
Hormonal factors, especially progesterone, influence meningioma growth, which can accelerate during pregnancy2 .
Meningioma FAQs
What is a meningioma?
A meningioma is a tumor that arises from the meninges, the membranes covering the brain and spinal cord. Most meningiomas are benign and grow slowly over time18 .
Can a small meningioma cause symptoms?
Small meningiomas often do not cause symptoms and may be found incidentally during imaging for other reasons. Symptoms usually develop as the tumor grows and compresses adjacent brain tissue20 3.
What causes meningiomas?
The exact cause is unclear, but risk factors include prior radiation exposure, female hormones, and genetic conditions such as neurofibromatosis type 22 11.
How are meningiomas treated?
Treatment depends on tumor size, location, and symptoms. Options include observation, surgical removal, and radiation therapy. Surgery aims to remove the tumor completely when possible18 194.
When should I seek emergency care?
Emergency care is needed for seizures lasting more than five minutes, seizures causing trauma or breathing problems, or multiple seizures in a row (status epilepticus) 7.
