PLAIN-LANGUAGE EDUCATION
A small word.
A complicated reality.
Start with the essentials. Take your questions to a clinician who knows your history and scans.
What is a cavernoma?
A cavernoma, or cerebral cavernous malformation (CCM), is an abnormal cluster of small blood vessels in the brain or spinal cord. It is a vascular malformation, not cancer. Some cause no symptoms; others cause seizures or neurological problems. MRI is the main diagnostic scan.
Symptoms can include headaches, numbness, weakness, altered vision, balance difficulties and problems with concentration. Their cause needs assessment: a symptom does not by itself prove that a cavernoma has bled.
What are the options?
Monitoring and a care plan
Observation can be appropriate. Agree when review or imaging is needed, who arranges it, and how to get help for changes.
Managing symptoms
Medication may help seizures or headaches. A neurologist can assess episodes and discuss investigations and treatment.
Specialist surgical assessment
Removal may be considered for selected symptomatic lesions. Location, bleeding history, seizure control and the risks of operating all matter. Surgery has risks, including neurological injury, and cannot promise freedom from symptoms.
Other approaches
Radiosurgery or minimally invasive techniques are options only in selected circumstances. Ask what evidence supports an approach for your particular lesion. Genetic assessment may be relevant for multiple lesions or a family history.
Sources: NHS treatment overview · 2025 consensus care guidelines · Treatment approaches
Everyday care: useful steps, fewer blanket bans
- Keep a brief record of episodes, duration, recovery and medication changes. Bring a witness account when possible.
- Take prescribed medicines as directed. Discuss side effects, supplements and changes with your clinician or pharmacist.
- Ask for an individual safety plan for bathing, swimming, cooking, work and exercise if seizures affect awareness.
- Do not drive after a suspected seizure until you have medical and licensing advice. Check DVLA seizure guidance.
- Do not stop prescribed blood-thinning medication, hormones or seizure medicines because of an online list. Discuss your individual benefits and risks.
- Do not treat supplements, rituals or restrictive diets as a proven way to remove a cavernoma.
Further reading: CCM care guidelines · NHS epilepsy guide
WHEN TO GET URGENT HELP
New or sudden symptoms need attention.
Call 999 in the UK for sudden stroke-like symptoms such as facial droop, arm weakness or speech difficulty, a sudden extremely severe headache, or loss of consciousness. Do not wait for a routine appointment. Elsewhere, use your local emergency number.
Seizure first aid