Gamma Knife for Trigeminal Neuralgia (Non-surgical) in Jordan
جاما نايف لعلاج ألم العصب الخامس بدون جراحة
Gamma Knife stereotactic radiosurgery for trigeminal neuralgia directs many weak radiation beams from multiple angles so that they converge on a very small point on the root of the trigeminal nerve. This produces a gradual change in the nerve that reduces transmission of the pain signal, with no surgical incision and without opening the skull. Trigeminal neuralgia is an electric-shock-like pain in one side of the face, triggered by light touch, chewing, tooth brushing or cold air. Treatment usually begins with medicines used for nerve pain, and radiosurgery is considered when medication is insufficient or not tolerated, or when other illnesses make open surgery higher risk. An MRI scan is required before any decision, to exclude secondary causes such as a tumour or multiple sclerosis. The plan is made by a multidisciplinary team: a neurologist, a neurosurgeon, a radiation oncologist and a medical physicist, and the options are weighed against microvascular decompression and percutaneous procedures. The choice depends on age, general health, the character of the pain and the imaging findings, and is determined by clinical examination rather than by reading a web page. The limits should be clear. The effect is not immediate: improvement usually begins after several weeks to a few months, so never stop your medication on your own while waiting for a result. The treatment does not remove a compressing blood vessel and does not repair a structural problem, and the pain can return after years, sometimes requiring a further procedure. Facial numbness is a recognised possible effect and becomes more likely if treatment is repeated. Results are less reliable in constant or burning atypical facial pain, and this is not a treatment for dental, jaw-joint or sinus pain, so those causes are excluded first. Treatment is delivered in a single session after the head is fixed in a frame or a custom mask and after detailed imaging and planning. Most patients go home the same day, with staged follow-up to assess the pain and adjust medication.
Procedure steps
- 1
Confirming the diagnosis and excluding secondary causes
The pain is characterised precisely in site, duration, triggers and relieving factors. MRI is then reviewed to exclude a tumour, multiple sclerosis or a vascular malformation, and a dental, sinus or jaw-joint source is ruled out.
- 2
Head fixation with a frame or mask
The head is immobilised either in a stereotactic frame fitted under local anaesthesia at defined points, or in a custom-made mask. The purpose is the same: to prevent any movement, because the accuracy of the treatment is measured in millimetres and cannot tolerate head motion.
- 3
High-resolution planning imaging
Very thin-slice imaging is performed after fixation to define the trigeminal nerve root, its course, and its relationship to the brainstem and surrounding vessels. These images are fused with earlier scans to build the three-dimensional model on which planning is based.
- 4
Team radiation planning
The neurosurgeon, radiation oncologist and medical physicist jointly define the target point on the nerve and calculate the dose distribution, so that radiation is concentrated in a very small volume while the brainstem and other adjacent structures are protected as far as possible.
- 5
Treatment session and staged follow-up
The patient lies awake and free of pain while the radiation is delivered, hearing only the machine. Fixation is then removed and most patients go home the same day. The result is reviewed at intervals over weeks and months, and medication is tapered gradually as improvement appears.
Before the procedure
Continue your usual nerve-pain medicines until your doctor tells you otherwise, and never stop a medicine abruptly. Tell the team everything you take, especially blood thinners and anticoagulants, because frame fixation requires this to be assessed, and report any allergy, neck problem or claustrophobia. Complete the requested MRI before the appointment, and see a dentist beforehand if a dental source of pain is still possible. Bring your previous reports and medicine list, wear comfortable clothing, and leave metal objects, jewellery and hairpins at home. Eat according to the team's instructions, and arrange for someone to drive and accompany you on the day, as you may feel tired or have a mild headache afterwards.
After the procedure
Expect improvement to take weeks to a few months, continue your medication during that period, and reduce it only on your doctor's decision and only gradually. Keep a daily record of pain severity, the number of attacks and their triggers; this record is the basis for judging the result and adjusting treatment. Care for the frame pin sites if a frame was used: clean them as taught and watch for redness. Return to your usual activity gradually, and expect mild tiredness or headache in the first days. **Contact your doctor immediately** if **facial numbness progresses**, especially if it involves the eye with dryness, redness or reduced vision, which needs urgent ophthalmic assessment to protect the cornea; if there is **clear weakness of the facial or chewing muscles**; if you develop **a new severe headache with vomiting or drowsiness**; if you have fever with neck stiffness; if your vision doubles; or if the pain suddenly worsens in an unfamiliar way.
Expected duration
The treatment session itself usually takes 30 to 90 minutes, while the whole day is needed for fixation, imaging and planning, with same-day discharge in most cases.
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