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Cavernous malformations, also called cerebral cavernous malformations or CCM, are abnormal clusters of tiny blood vessels that can form in the brain or spinal cord. Many times they form without causing any symptoms, but in some cases, they can lead to neurological symptoms such as seizures, headaches, or a brain hemorrhage.
Once a cavernous malformation bleeds even once, the risk of another bleed goes up significantly. For anyone diagnosed with a CCM, two major decisions loom: should you simply observe and monitor, or is it time to consider surgery? Read on to learn how neurosurgeons determine if and when to operate and where to find the best cavernous malformation surgeon in Los Angeles.
A cavernous malformation is like a small tangle of abnormally formed blood vessels that didn’t form the way they should. Instead of smooth tunnels that carry blood, these vessels look more like tiny, thin-walled balloons grouped together. Doctors often say they resemble a mulberry on an MRI.
These lesions can appear in the brain, brainstem, or spinal cord, and some people have just one, while others have several due to a genetic mutation or inherited condition known as familial CCM You may also hear them referred to as cavernomas or cavernous angiomas. Many people don’t know they have one until a scan for something unrelated picks it up, such as a headache workup or after a bump on the head leads to an unexpected MRI.
Most cavernous malformations stay quiet, but when they do act up, the first sign is often something you can’t ignore, such as:
These changes can happen fast, especially after a small hemorrhage, and they’re often the body’s alarm bell to get checked right away.
For most people with a cavernous malformation, the chance of a serious bleed is low, usually around one in a hundred if the lesion hasn’t bled before. Once it does bleed, the odds increase because the vessel becomes more unpredictable. That’s when people notice symptoms similar to a stroke or TIA, like sudden numbness on one side of the body or vision loss in one eye.
Where the CCM is located makes a big difference. Lesions in the brainstem, the crossroads of vital nerves and pathways, are more likely to bleed again and with more noticeable symptoms. The greatest danger often comes in the first months or year after an initial hemorrhage, when the vessel walls are still fragile. Over time, especially after two years without another event, the risk may drop, but the possibility never fully disappears.
Surgery for a cavernous malformation is generally recommended when the CCM is causing symptoms that disrupt daily life, such as seizures that don’t respond to medication or repeated bleeding.
The decision to get surgery for CCM can feel overwhelming, especially when the lesion sits in a delicate spot like the brainstem or deep within the spinal cord. That’s why the best cavernous malformation surgeon in Los Angeles will walk you through the risks and benefits in plain terms and use images from MRI scans to explain what they see and what could happen over time with and without surgery.
If your cavernous malformation isn’t causing symptoms that disrupt your daily life, non-surgical management and monitoring may be the best approach for now. In these cases, focus shifts to watchful waiting and symptom control. Many people live full lives with a CCM that’s regularly checked through MRI scans. For those dealing with seizures, anti-seizure medications can reduce or stop them, giving life a steadier rhythm again. Headaches or other neurological symptoms can also be treated as they arise, with a plan to seek medical attention quickly if anything changes suddenly, like new weakness or vision problems.
A cavernous malformation diagnosis can change your life, and it deserves a surgical team that treats both the science and the story with equal care. At California Neurosurgical Specialists, we combine elite surgical skill with a deep respect for the individual behind each MRI scan.
Led by Dr. Arnau Benet, a fellowship-trained cerebrovascular neurosurgeon known for expertly navigating even the most delicate brain and spinal lesions, we bring advanced microsurgical and minimally invasive techniques to complex cases, including cavernous malformations.
Our practice blends precision with compassion, guiding you through clear decisions, realistic expectations, and a tailored treatment plan that puts your well-being at the center. Patients from across Los Angeles and beyond visit our state-of-the-art clinics in Santa Barbara and Westlake Village because they trust our surgical excellence above anyone else.
Ready to get effective treatment from the best cavernous malformation surgeon in Los Angeles?

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