Meningiomas typically grow slowly and gradually press against nearby brain tissue, nerves, and blood vessels. As this pressure builds over time, it may interfere with normal brain function, leading to symptoms such as headaches, vision changes, memory issues, or weakness.The neurological symptoms commonly have a slow onset and can sometimes be mistaken for aging, stress, or unrelated health concerns.
Meningioma brain tumors are the most commonly diagnosed primary brain tumors in the United States, yet many people have never heard of them until they receive a diagnosis themselves. Arising from the protective layers of tissue surrounding the brain and spinal cord, called the meninges, these tumors are most often benign and slow-growing. That slow growth is precisely what makes their neurological effects so easy to overlook in the early stages. By the time symptoms become consistently noticeable, a meningioma may have been present and expanding silently for years, pressing gradually against surrounding brain tissue, nerves, and blood vessels.
Published on:
November 3, 2026
Category:
Health Resources
A meningioma is a tumor that forms in the meninges and grows inward, pressing on adjacent brain tissue, nerves, or blood vessels rather than arising from within the brain itself.
Approximately 80% are classified as benign and slow-growing, though atypical and malignant forms also occur. Meningiomas account for roughly 30% of all primary brain tumors and are three times more common in women than in men.
Because they grow slowly, some remain asymptomatic for a lifetime and are discovered only incidentally on imaging performed for unrelated reasons. When symptoms do occur, they depend on the tumor's size, grade, and location within the skull.
Early symptoms of meningioma brain tumors may be subtle and may resemble common health complaints or the effects of normal aging. The symptoms of a meningioma typically begin slowly, and the tumor's gradual growth can make a definitive diagnosis challenging because symptoms may be attributed to other conditions first.
Early signs may include weakness or numbness in the arms or legs, subtle changes in personality or behavior, mild hearing changes, and a gradual loss of smell.
Convexity meningiomas, which grow on the outer surface of the brain, may not produce symptoms until they reach a considerable size. The slow accumulation of pressure on surrounding tissue means that affected individuals may adapt to gradual changes without recognizing them as clinically significant until symptoms become harder to ignore or an unrelated imaging scan reveals the tumor's presence.
Persistent headaches and vision changes may be among the more commonly recognized symptoms potentially associated with meningioma brain tumors.
Headaches linked to meningioma may be worse in the morning and may be accompanied by nausea, reflecting increased intracranial pressure from the growing tumor. Vision changes may include blurred vision, double vision, or loss of peripheral vision, particularly when a meningioma grows near the optic nerve or visual pathway.
More than one-third of people with meningioma will experience seizures at some point, a symptom that can range from mild focal episodes to generalized seizures, and around 12 to 19% continue to experience seizures even after surgical removal.
These symptoms are not exclusive to meningioma, and their presence alone does not necessarily confirm presence of a tumor. What matters clinically is their persistence, progression, and whether they occur in combination with other neurological changes that warrant imaging evaluation. A person who notices persistent double vision, unexplained headaches that are worse in the morning, or a first-time seizure without prior history should seek evaluation rather than attribute these changes to fatigue, aging, or stress.
Cognitive and behavioral changes may be a less widely recognized but clinically significant category of meningioma symptoms. Depending on a tumor's location, affected individuals may experience memory difficulties, confusion, impaired concentration, personality changes, or problems with speech and language.
Cognitive difficulties, including problems with learning, thinking, and remembering, are recognized meningioma symptoms, particularly when tumors press on the frontal or temporal lobes. Olfactory groove meningiomas, which grow along the nerves connected to the sense of smell, can cause personality changes sometimes mistaken for depression before any other neurological signs emerge. Because these cognitive and behavioral changes develop gradually and may be attributed to stress, mental health conditions, or normal aging, they often delay the clinical suspicion of a brain tumor by months or even years.
Make an appointment with a healthcare provider for any lasting neurological symptoms that worsen over time, and seek immediate care for sudden-onset seizures or abrupt changes in vision or memory.
A neurologist will typically conduct a thorough neurological examination, assessing mental status, cranial nerve function, coordination, and reflexes. MRI is the preferred imaging technique for identifying meningiomas, as it provides detailed visualization of the tumor's size, location, and relationship to adjacent structures. CT scanning may also be used.
A growing body of peer-reviewed research has examined the relationship between prolonged use of injectable medroxyprogesterone acetate, the active ingredient in Depo-Provera, and an elevated risk of cerebral meningioma. A 2024 study points to an association between extended use of injectable medroxyprogesterone and meningioma in women, and a 2025 study reported a higher risk of meningioma in depot medroxyprogesterone acetate users compared with controls. In response, the FDA approved a label change for Depo-Provera in 2025, adding a warning about meningioma risk.
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