Stereotactic radiosurgery for a brain AVM

It may be considered when the AVM is small enough to target accurately or lies where open surgery would carry added risk. A multidisciplinary neurovascular team weighs this option against microsurgery, embolisation, observation or a combined approach.

Detailed vessel and brain images are mapped into a treatment plan. A rigid head frame or custom mask limits movement, and a machine delivers converging radiation beams to the abnormal vessel tangle. Gamma Knife and CyberKnife are technology names; the clinical aim is precise targeting.

The vessels close through a biological response that unfolds over time. Until imaging confirms that the AVM is no longer carrying blood, bleeding remains possible. Radiation can also cause temporary or delayed swelling in nearby brain tissue, with effects depending on the treated location.

Review medicines, allergies, pregnancy possibility, implanted devices and past reactions to contrast material with the team. Ask whether sedation is planned and arrange transport if the centre advises it. Follow instructions for food, drink and regular medicines.

After treatment, use prescribed pain relief and care for any frame-pin sites as directed. Keep taking anti-seizure medicine unless the specialist changes it. Attend every scan and clinic visit, because follow-up images guide decisions about precautions and further treatment.

Treat a sudden intense headache, a first seizure, prolonged seizure, fainting, new facial droop, limb weakness, speech difficulty, confusion, vision change or loss of coordination as an emergency. These are neurological red flags, regardless of when radiosurgery was performed.

Call the treating service promptly about headaches that steadily worsen, repeated nausea, unusual sleepiness, a new but mild sensory change, or redness, swelling or discharge where a frame pin entered the skin. The team can decide whether examination or imaging is needed.

Consider asking: What features make my AVM suitable for this technique? Which device and positioning method will you use? What brain functions are close to the target? How will you manage swelling? When will scans be performed, and what happens if the AVM remains open?