Meningiomas and gliomas can both be called brain tumors, but they start in different tissues, behave differently, and often require different treatment strategies.
Getting an MRI report that mentions a “mass” or “tumor” can make your mind jump straight to the worst-case scenario. Many patients come to us after weeks of headaches that feel different than usual, a first-time seizure, or a new problem with speech, balance, or vision—only to be told the finding could represent a meningioma or a glioma. Those two words sound similar, but they describe tumors that start in different places and are approached differently.
This article explains the difference between meningioma and glioma in clear, patient-friendly terms—where each tumor starts, how symptoms tend to show up, how doctors confirm the diagnosis, and what treatment paths are commonly considered. If you’re searching for the best brain surgeon Los Angeles because you want clarity on next steps, this will help you know what questions to ask at your consultation.
The biggest difference is the tissue the tumor comes from.
Meningioma usually starts in the meninges, the thin layers of tissue that wrap around the brain and spinal cord like protective lining. Many meningiomas are “extra-axial,” meaning they grow on the surface of the brain rather than inside the brain tissue. Because of that, they often affect the brain by pressing on it or irritating nearby nerves and blood vessels.
Glioma begins in glial cells, which live within the brain and spinal cord and help support nerve cells. Gliomas are typically “intra-axial,” meaning they originate inside the brain tissue. That can make treatment planning more complex, since the tumor may be intertwined with areas responsible for language, movement, sensation, or vision.
Imaging can suggest which type is more likely, but the most accurate answers usually come from a specialist review of the scan and, in many cases, tissue diagnosis (biopsy or surgical removal) when appropriate.
Meningiomas are often slow-growing, and some are found incidentally—meaning they show up on imaging that was done for a different reason. When they’re small and not affecting nearby structures, careful monitoring with periodic MRI may be a reasonable option.
Still, “slow-growing” doesn’t automatically mean “low impact.” A meningioma can cause meaningful symptoms if it presses on the brain, affects cranial nerves, blocks normal cerebrospinal fluid flow, or leads to swelling in the surrounding tissue.
Management depends on factors like tumor size, location (for example, near the optic nerves or brainstem), growth pattern on serial imaging, and your symptoms. For a more detailed overview of evaluation and care, see our page on meningioma treatment.
“Glioma” is a broad category rather than one single diagnosis. Gliomas can vary widely in how they look on imaging, how quickly they grow, and how they’re treated. That variability is why a plan is usually built around both:
Imaging can provide clues, but it can’t always define the exact tumor subtype. In many cases, tissue obtained during surgery or biopsy guides the next steps, such as whether additional treatment (like radiation or medication-based therapy) is recommended after surgery.
If your report is confusing or seems inconsistent with your symptoms, an expert review is often helpful. Our brain tumor treatment page explains how neurosurgeons think through diagnosis and treatment planning for different tumor types.
Symptoms are driven more by location and pressure on the brain than by the tumor name alone. Some people have no symptoms at all. Others notice subtle changes that gradually become harder to ignore—like struggling to find words, a new clumsiness in one hand, or headaches that start waking them from sleep.
Symptoms that can be associated with brain tumors (including meningioma or glioma) include:
These symptoms can also be caused by other conditions. But new, progressive, or sudden neurological symptoms—especially seizures, weakness, speech difficulty, or significant vision changes—deserve prompt medical evaluation.
Diagnosis usually begins with imaging, most often an MRI of the brain (and sometimes CT in certain situations). Radiologists and neurosurgeons look for features that suggest whether a tumor is extra-axial (more typical of many meningiomas) or intra-axial (more typical of gliomas), as well as clues about swelling, mass effect, and involvement of nearby structures.
A thorough evaluation also includes a neurological exam and a careful symptom history—what started, what changed, and how it’s affecting daily life (work, driving, sleep, balance, or safety).
When the diagnosis remains uncertain or when treatment requires more precision, a tissue diagnosis may be recommended through biopsy or surgical removal. That tissue information can strongly influence whether observation alone is reasonable or whether additional treatment is advised.
Treatment isn’t one-size-fits-all. The plan is tailored to tumor type, size, location, growth over time, your symptoms, and your overall health. Many patients benefit from understanding the main categories of care:
If a tumor appears slow-growing, is not causing symptoms, and is in a location where immediate treatment may carry higher risk than benefit, your neurosurgeon may recommend monitoring with scheduled MRI scans. The goal is to watch for growth or new symptoms while avoiding unnecessary intervention.
Surgery may be recommended to remove as much tumor as is safely possible, relieve pressure on the brain, improve symptoms, and/or obtain tissue for diagnosis. The safest approach depends on where the tumor sits and its relationship to critical brain areas and blood vessels.
Some patients may be candidates for less disruptive approaches depending on tumor location and anatomy. Learn more about options on our minimally invasive brain tumor surgery page, and explore our broader overview of brain surgery.
Radiation therapy may be considered when a tumor can’t be fully removed safely, when pathology suggests a higher risk of regrowth, or if a tumor returns after initial treatment. For some gliomas, additional medication-based therapies may be part of the treatment plan based on pathology and tumor biology.
The purpose of combining treatments—when appropriate—is to balance tumor control with preserving neurological function and quality of life.
You do not need to be “ready for surgery” to speak with a neurosurgeon. A consultation can clarify what the scan suggests, which symptoms may be connected, and what choices exist besides rushing into an operation.
Many patients seek a second opinion when:
In high-stakes decisions, clarity is the treatment—because the right plan depends on the right diagnosis and a thoughtful discussion of risks and benefits.
If you’ve been told you may have a meningioma or glioma, the next step should feel organized, not chaotic. At Yashar Neurosurgery, Parham Yashar, MD provides careful imaging review, straightforward explanations, and a full discussion of options—from monitoring to advanced surgical care—based on what is safest and most appropriate for your specific situation.
To schedule an evaluation at our Los Angeles office, call (424) 209-2669 or visit us at 8436 W. 3rd Street, Suite 800, Los Angeles, CA 90048.
Please complete and submit the form below and a member of our staff will contact you shortly.
