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Gamma Knife surgery in India

Gamma Knife is a form of radiation treatment for the brain that involves no cutting, no incision and usually no overnight stay. Around 200 fine beams of gamma radiation meet at the target so the tumour or nerve receives a high dose while the brain around it receives very little. Most patients go home the same day.

Also called
Gamma Knife radiosurgery, GKRS, stereotactic radiosurgery
Anaesthetic
Usually none. Local anaesthetic where the head frame is fitted
Typical stay in India
About 7 to 10 days, including scans and review
Sessions
Usually one. Some conditions need a repeat later
Commonly treats
Brain tumours, metastases, meningioma, acoustic neuroma, AVM, trigeminal neuralgia
Cost
Depends on your scans and diagnosis. You receive a written estimate before you travel

What Gamma Knife actually is

The name is misleading, and it frightens people unnecessarily. There is no knife and no blade. Nothing touches your brain. You lie still while a machine delivers beams of radiation from many directions at once.

Each individual beam is weak enough to pass through healthy brain tissue without harming it. They are aimed so that they all converge on one point. Only where they meet is the dose strong enough to work. That is the whole idea: a high dose exactly on the target, a very low dose everywhere else.

You may also see it written as GKRS, gamma radiosurgery, or simply stereotactic radiosurgery. Patients often search for it as "gamma ray treatment" or spell it "gammanife". It is all the same procedure.

Is it really surgery?

Not in the way you are probably imagining. It is classed as radiosurgery because it is precise enough to do what surgery does, but the skull is never opened. Most people are awake throughout. Many read or listen to music. The main discomfort is not the radiation, which you cannot feel at all, but the head frame that holds you still.

A frame is fixed to the skull with pins under local anaesthetic. There is pressure and a brief sting when the anaesthetic goes in. Some newer systems use a moulded mask instead of pins. Ask which your hospital uses, because it changes the experience considerably.

Who it suits, and who it does not

Often a good option

  • Small to medium brain tumours with a clear edge on the scan
  • Brain metastases, including several at once
  • Meningioma and acoustic neuroma
  • Arteriovenous malformation (AVM)
  • Trigeminal neuralgia that has not responded to medication
  • Tumours sitting somewhere open surgery cannot safely reach
  • Patients not well enough for general anaesthesia

Usually not the answer

  • Large tumours. Above roughly 3 cm the dose to healthy tissue becomes too high
  • Tumours with a diffuse, unclear border, such as most glioblastoma
  • Cancers pressing dangerously on the brain that need bulk removed now
  • Disease outside the head and upper neck
  • Cases where a tissue diagnosis is still needed, since nothing is removed to biopsy

This is the part other websites leave out. Gamma Knife is not better than surgery, and it is not a cure-all. It is better for some situations and worse for others. A specialist who tells you it suits every case is selling, not advising. If your scans show it is the wrong choice, the consultant on your call will say so.

Gamma Knife for trigeminal neuralgia

This is the single most common reason people search for Gamma Knife, so it is worth its own section. Trigeminal neuralgia is a facial-pain condition, often described as sudden electric shocks down one side of the face, that can be severe enough to make eating, talking or even a breeze unbearable.

When medication no longer controls the pain, Gamma Knife is one of the options. A precise dose is aimed at the trigeminal nerve where it leaves the brainstem. Nothing is cut. Relief is not instant, which surprises people: it usually builds over two weeks to three months as the treated nerve fibres respond.

It does not work for everyone, and in a minority the pain can return later or, rarely, the procedure can make the numbness or pain worse rather than better. Whether it is the right choice ahead of the other options depends on your scans and your history, which is exactly the kind of question the teleconsultation exists to answer.

Read the full guide to Gamma Knife for trigeminal neuralgia, covering how long relief takes, the risk of facial numbness, and how it compares with microvascular decompression.

What happens, step by step

  1. Frame or mask fitted. Local anaesthetic, then the frame is pinned, or a mask is moulded to your face. Around 30 minutes.
  2. Imaging. An MRI, sometimes with a CT or angiogram, maps the target to within a fraction of a millimetre.
  3. Planning. A neurosurgeon, radiation oncologist and physicist build your dose plan together. This takes one to two hours and you usually wait during it.
  4. Treatment. You lie on the couch and the machine does the work. Anywhere from 20 minutes to a few hours depending on the target. You feel nothing.
  5. Frame removed, and home. Most people leave the same day. Some stay one night for observation.
  6. Follow-up scans. Usually at three and six months. This is how the result is judged, because nothing visible changes on the day.

How long before it works

This is the hardest part to accept, so it is worth being plain about it. Gamma Knife does not remove anything. It damages the DNA inside the target cells so they stop dividing and die off slowly. Nothing is gone when you walk out.

Tumours typically stop growing first, then shrink over months. Many simply stay the same size permanently, and that counts as success: the aim is control, not disappearance. For trigeminal neuralgia, pain relief usually arrives somewhere between two weeks and three months. Your follow-up scan, not how you feel on the day, tells you whether it worked.

What it costs in India

Nobody honest can quote you a figure before seeing your scans, and you should be wary of any site that does. The dose plan depends on how many targets there are, how big they are and where they sit, and the price follows the plan.

Indicative partner-hospital package prices, USD, as at July 2026.
ProcedureIndicative costHospital stay
Stereotactic radiosurgery$5,700Usually same day
Craniotomy (surgical alternative)$6,000–7,0004–5 days
What the package includes: hospital charges, the surgeon's fee, medicines given during your stay, and any implants and consumables. Not included: pre-operative investigations, flights, visa, accommodation outside the hospital stay, or treatment for complications. Indicative prices as at July 2026, not a quotation; your written estimate follows the specialist's review of your reports. No part of it is a fee to us; the hospital pays us, so your bill is never marked up.

What actually moves the number:

India is substantially less expensive than the United States or the United Kingdom for this procedure, which is the reason most international patients look here. But the honest answer to "how much" is that you will be given a written estimate covering the procedure, the stay and the follow-up before you book anything. No part of that estimate is a fee to us. The hospital pays us, so your bill is never increased to cover our involvement.

Ask specifically whether an estimate includes follow-up imaging. That is where quotes from different hospitals most often stop being comparable.

Where it is done

Gamma Knife needs a dedicated unit, so it is not available at every hospital. Our partner network includes centres with established neurosurgery and radiation oncology departments. Which hospital suits you depends on your diagnosis and on which consultant is right for the case, not on which name you have heard of.

We will tell you the hospital, the consultant's name and their credentials before your call, so you can check them yourself. See our partner hospitals.

Recovery and side effects

Recovery is quick compared with open surgery. Most people are back to normal activity within a day or two. The pin sites can be tender for a few days.

Tiredness is the most common after-effect, and it can arrive a week or two later rather than immediately. Headache and mild nausea happen. Hair loss is uncommon and, when it happens, is usually a small patch where a beam entered, not general hair loss of the kind chemotherapy causes.

Swelling around the treated area can develop over the following months and is usually managed with steroids. Less commonly, radiation can affect nearby structures, and which structures are at risk depends entirely on where your target sits. A target near the hearing nerve carries a small risk to hearing; one near the optic nerve carries a small risk to vision; one near a memory structure carries a small risk to memory. Seizures and lasting nerve damage are uncommon. This is precisely why the position of your target matters so much and why the planning stage takes as long as it does. Your consultant should explain the specific risks for your target, not the general ones, and you are entitled to ask for those specifics before you decide anything.

Travelling to India for treatment

You will need a medical visa. Once a hospital accepts your case it issues a letter that supports the application, and someone travelling with you can usually apply for a medical attendant visa at the same time. We help you prepare the paperwork and tell you what your embassy will ask for. Read the medical visa guide.

Plan for roughly 7 to 10 days. That covers arrival, scans, the procedure itself and a review before you fly. If your consultant wants a follow-up scan while you are still in the country, it may be longer, and they will tell you that on the call rather than after you arrive.

We regularly help patients travelling from across Africa, including Nigeria, Kenya, Ethiopia, Ghana, Tanzania and Uganda, and from Central Asia, including Kazakhstan, Uzbekistan, Kyrgyzstan and Turkmenistan, as well as from the Pacific. If English is not the language you would rather explain your illness in, we can arrange an interpreter for the consultation.

Questions patients ask us

Is Gamma Knife surgery painful?

The radiation itself cannot be felt at all. What people describe as painful is the head frame being pinned, which is done under local anaesthetic and lasts a few minutes. Pin sites ache for a few days afterwards. If pain is a particular worry for you, ask whether a mask-based system is suitable for your case.

Can Gamma Knife cause cancer?

A second tumour caused by the radiation itself is possible but very rare, and it would typically take many years to appear. For someone being treated for a brain tumour now, specialists generally consider that long-term risk far smaller than the risk of leaving the current problem untreated. Ask your consultant to put the numbers in the context of your own age and diagnosis.

Can it cause memory loss?

Gamma Knife is deliberately focused to avoid this. Because the dose falls away sharply outside the target, effects on memory and thinking are much less common than with whole-brain radiotherapy, which treats the entire brain. Risk rises if the target sits near memory structures or if many areas are treated. This is a fair and specific question to ask about your own scan.

Will I lose my hair?

Usually not. Any hair loss tends to be a small patch where a beam passed through the scalp, and it commonly grows back. This is quite different from chemotherapy, which affects hair all over the body.

Can it cause seizures or dementia?

Both are uncommon, and both depend on where the target sits and how much brain is treated. Because Gamma Knife is tightly focused, the risk to thinking and memory is far lower than with whole-brain radiotherapy. A single small target rarely causes these problems; several targets, or a target near a sensitive area, raise the risk. Ask your consultant to speak to your specific scan rather than the general figures.

Does it actually remove the tumour?

No, and this catches many people out. Gamma Knife does not cut anything out. It damages the tumour's cells so they stop dividing and slowly die. The tumour often shrinks over months, and sometimes it simply stops growing and stays the same size. A tumour that has stopped growing is a successful result, even though a scan still shows something there.

Can Gamma Knife treat glioblastoma?

Usually not as the main treatment. Glioblastoma spreads with a diffuse, unclear edge, and Gamma Knife works best on targets with a clear border. It is occasionally used for a small recurrence alongside other treatment, but a specialist who offers it as a primary cure for glioblastoma is overpromising. This is one of the cases where an honest consultation may point you to a different plan.

What is the radiation made of?

The classic Gamma Knife uses cobalt-60 sources arranged around a helmet, which produce the gamma rays. You are not made radioactive by the treatment and you are not a risk to your family afterwards. The radiation acts only where the beams converge and does not linger in your body.

Do I need general anaesthesia?

Adults almost never do. You are awake for the whole procedure, with local anaesthetic only where the frame pins go. Children are usually treated under general anaesthesia because they need to stay completely still.

Is it a one-time treatment?

Usually yes, which is one of its main advantages over conventional radiotherapy that runs daily for weeks. Some conditions need a second session later, and treatment can often be repeated if new lesions appear. Whether repeat treatment is safe in your case depends on the dose already given and how much time has passed.

Are Gamma Knife and CyberKnife the same thing?

No, though they do a similar job. Gamma Knife uses cobalt sources fixed around a helmet and treats the head only. CyberKnife uses a linear accelerator on a robotic arm and can treat the body as well, usually over a few sessions rather than one. For most brain targets the outcomes are broadly comparable, and the better choice depends on the target's size, site and shape. Read the full comparison.

Is Gamma Knife available in India?

Yes. India has had Gamma Knife units for many years, in dedicated neurosurgical centres rather than in every hospital. Our partner network includes such centres, and we will name the hospital and consultant before you commit to anything.

Should I go to India, or to Turkey or Korea?

These are the destinations patients most often weigh against each other, and there is no single right answer. India's case rests on the depth of its neurosurgical centres, the number of consultants who do this work every week, English being widely spoken in its hospitals, and cost. What settles it for most people is not a brochure comparison but talking to the actual doctor who would treat them. That is what the free teleconsultation is for: you can judge India for yourself before you commit to travelling anywhere.

How long does it take to work?

Tumours typically stop growing within months and may shrink slowly over a year or more. A tumour that simply stops growing is a successful outcome. For trigeminal neuralgia, pain usually eases between two weeks and three months. Follow-up imaging, not how you feel immediately, is how the result is measured.

Does insurance cover it?

That depends entirely on your insurer and your country. Some international policies cover treatment abroad, many do not, and some cover the procedure but not travel or accommodation. Ask your insurer for confirmation in writing, and use the written estimate from the hospital when you do, because they will want the specific procedure codes.