Vestibular Schwannomas
A typically benign tumor on the vestibular nerve, often associated with hearing loss, tinnitus, and balance changes. Management options range from observation to radiosurgery to microsurgery — the right path depends on your tumor and your priorities.
Hearing, tinnitus & balance
Vestibular schwannomas grow on the vestibular nerve and often present with hearing loss, ringing in the ear, or balance difficulty.
Radiosurgery is established
Evidence-based guidelines support radiosurgery as a treatment option for appropriate patients, with high rates of tumor control.
Individualized management
Options include observation, microsurgery, and radiosurgery — decisions are guided by tumor size, growth, symptoms, and personal priorities.
What are vestibular schwannomas?
Vestibular schwannomas (also called acoustic neuromas) are benign tumors that arise from the Schwann cells covering the vestibular nerve — the nerve responsible for balance. These tumors often grow slowly and are located in the cerebellopontine angle, near the brainstem and cranial nerves that control hearing, facial movement, and sensation.
Treatment decisions are individualized based on several factors. Not every vestibular schwannoma needs treatment — many are safely observed with periodic imaging.
Treatment decisions are guided by:
Who may be a candidate for Gamma Knife radiosurgery?
Potential candidates include patients with:
Gamma Knife is one of several management options — your team will help determine if it's the best fit for your situation.
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✓Small-to-moderate size tumors that are appropriate for focused radiation.
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✓Documented growth on serial imaging, or symptoms warranting treatment.
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✓Preference to avoid open surgery, or elevated surgical risk due to age or medical conditions.
Gamma Knife Radiosurgery
Evidence-based guidelines describe radiosurgery as part of vestibular schwannoma management. The treatment is outpatient and avoids open surgery.
How Gamma Knife Works for Vestibular Schwannomas
Highly focused radiation beams converge on the tumor with precision, delivering a therapeutic dose while minimizing exposure to the surrounding brainstem and cranial nerves.
Rigid Head Frame
Traditional precision with rigid fixation. Typically single-session treatment. The frame is placed under local anesthesia and removed the same day.
Image-Guided Frameless
Thermoplastic mask with onboard imaging and motion monitoring. May improve comfort and can support fractionated delivery for select scenarios.
What to Expect
Gamma Knife for vestibular schwannomas is an outpatient process — most patients go home the same day.
Before
MRI with contrast for treatment planning. Hearing testing (audiometry) may be part of your baseline assessment. A planning visit to discuss immobilization type and treatment goals.
During
Outpatient treatment day — frame or mask is placed, imaging is completed, the treatment plan is finalized, and radiation is delivered. The treatment itself is painless, and most sessions are completed within a single day.
After
Temporary fatigue is common in the days following treatment. Follow-up MRIs track tumor control and surrounding tissue response over time — typically yearly for the first several years.
Benefits and Risks
Potential Benefits
- High likelihood of tumor control in appropriately selected patients
- Avoidance of open surgery and its associated recovery
- Outpatient, same-day treatment with short recovery
- Preservation of neurologic function as a primary treatment goal
Possible Risks
- Hearing changes — the most common concern; risk depends on tumor size and baseline hearing
- Balance symptoms — may temporarily worsen before stabilizing
- Facial nerve effects — rare with modern dosing, but possible given proximity
- Radiation-related swelling — may require short-term steroid management
Patient FAQs
Do tumors shrink after radiosurgery?
How often will I need MRIs?
When to Seek Urgent Care
Seek urgent evaluation for sudden facial weakness, severe vertigo with inability to walk safely, severe headache with vomiting, or new neurologic deficits.