Gamma Knife Radiosurgery

Gamma Knife radiosurgery is not a knife and involves no incision. It focuses around 200 narrow beams of gamma radiation from cobalt-60 sources onto a target inside the head, with accuracy better than a millimetre. Each beam alone is too weak to harm the tissue it crosses; where they meet, the dose is high enough to stop tumour cells dividing or to close abnormal blood vessels.

It controls many small brain tumours and vascular malformations in a single outpatient session, without opening the skull. It does not remove the lesion: the effect develops over months to years, and it is unsuitable for large targets or those pressing hard on the brain.

What Gamma Knife Radiosurgery involves

On the treatment day a lightweight frame is fixed to the skull with four pins under local anaesthetic, or, on newer machines, a custom thermoplastic mask is moulded to your face instead. You then have a high-resolution MRI, and sometimes CT or an angiogram, with the frame or mask in place. A neurosurgeon, a radiation oncologist and a medical physicist outline the target and nearby critical structures such as the optic nerves and brainstem, and compute a plan. You lie on the couch, which slides into the unit and moves automatically between positions while the radiation is delivered. The machine is silent, and you feel nothing. The frame is then removed.

Who is a good candidate for Gamma Knife Radiosurgery?

Suitability depends on the size, type and location of the lesion, assessed on recent MRI.

• Brain metastases, typically up to about 3 cm each, including multiple deposits
• Vestibular schwannoma (acoustic neuroma) of small to medium size
• Meningiomas in locations where surgery is risky, such as the skull base, or remnants after surgery
• Arteriovenous malformations under about 3 cm
• Pituitary adenoma remnants or recurrences
• Trigeminal neuralgia not controlled by medication

It is usually not the right choice if:

• Lesions larger than about 3 to 4 cm, or causing significant pressure and swelling, where surgery is safer
• Tumours touching the optic nerves or chiasm, unless treatment is fractionated
• Primary malignant gliomas as first treatment, because they infiltrate beyond what can be targeted
• Disease outside the head, for which linac-based stereotactic body radiotherapy is used
• Anyone needing an urgent tissue diagnosis or rapid decompression

الخيارات التقنية

• Frame-based single session: The classic method, with the greatest rigidity and precision.
• Mask-based, fractionated treatment: On newer units, 3 to 5 smaller doses on separate days for larger targets or those near the optic pathway.
• Linac-based radiosurgery and CyberKnife: Alternative platforms that deliver comparable focused treatment; the choice depends on the target and local expertise.
• Staged radiosurgery: Large malformations treated in parts, months apart.

ماذا يحدث خلال علاجك

The whole day takes 4 to 8 hours, but the radiation itself lasts from 20 minutes to 2 hours depending on the dose, the number of targets and the age of the cobalt sources. Frame placement involves four brief stinging injections and a feeling of pressure. During treatment you are awake, can listen to music and can talk to the team by intercom. Most people go home or to their hotel the same day.

الإعداد لرحلتك

In most cases a single treatment day is needed, with a consultation and imaging review the day before and a check the day after, so 3 to 5 days in the city is usual. Fractionated treatment needs about a week. Follow-up MRI at home is essential: typically at 2 to 3 months for metastases and at 6 to 12 months and then yearly for benign tumours and malformations.

• Tell the doctor about medication, allergies, pregnancy or breastfeeding, and any history of cold sores, keloid scars or autoimmune disease
• Avoid alcohol, aspirin and anti-inflammatory painkillers for a few days beforehand if your own doctor agrees, to reduce bruising
• Arrive without make-up on the treatment area and avoid sunbeds and strong sun for two weeks before

التعافي والنتائج

You may have a headache, tender pin sites or mild nausea for a day or two, and you can return to normal activities within a day or so. There is no hair loss, except occasionally a small patch if the target is near the scalp. The biological effect is slow: metastases shrink over weeks to months, benign tumours usually stop growing and may shrink over years, arteriovenous malformations close over 2 to 4 years, and relief of trigeminal pain typically takes weeks. The treated area can swell temporarily some months later.

• Back to everyday activity: 1 to 2 days
• When results show: Weeks to years depending on the condition
• How long they last: Monitored by MRI for years

سياسة السلامة والمخاطر والتنقيح

Serious complications are uncommon and depend mostly on location and dose.

• Swelling around the target weeks to months later, causing headache or neurological symptoms and sometimes needing steroids
• Radiation necrosis, dead tissue that can mimic tumour regrowth on MRI
• Hearing loss, facial numbness or, rarely, facial weakness after treatment of a vestibular schwannoma
• Seizures in the first days with lesions near the brain surface
• Facial numbness after treatment for trigeminal neuralgia
• Bleeding from an arteriovenous malformation remains possible until it has fully closed
• Failure to control the lesion, requiring repeat treatment or surgery
• A very small long-term risk of a radiation-induced tumour

Every written proposal arranged through Clinic-Y states what the clinic covers if a correction is needed. Ask for it before you book, not after.

Cost of Gamma Knife Radiosurgery in Türkiye

Clinic-Y does not publish a single price for Gamma Knife Radiosurgery, because the honest figure depends on your case. What moves it:

• Number of targets and whether treatment is single-session or fractionated
• Platform used: Gamma Knife, CyberKnife or linac
• MRI, CT or angiography on the day
• Specialist planning team time
• Follow-up imaging, which is usually done at home

Send your photographs or reports and you receive written, all-inclusive proposals from suitable teams, side by side. Reviewing your case is free.

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