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Algology
Trigeminal Neuralgia
It is a chronic and extremely severe pain syndrome caused by the affection of the trigeminal nerve, the 5th cranial nerve that carries facial sensation to the brain. It is considered one of the most severe pains known, and because it dramatically reduces the patient's quality of life, it has historically been referred to as "tic douloureux" (painful tic) or the "suicide disease".
ℹWhat is Trigeminal Neuralgia?
The trigeminal nerve is one of the most widely distributed nerves in the head and is anatomically classified as the 5th cranial nerve. Trigeminal Neuralgia is a chronic pain condition affecting this nerve. It involves a type of neuropathic pain that causes sudden, irregular episodes of facial pain described as a burning or electric shock sensation.
The disease typically affects the cheek (V2) and lower jaw (V3) branches. The pain has highly typical characteristics, and the diagnosis is largely based on how the patient describes it.
Common Symptoms
Pain Character
The pain is described as an electric shock, stabbing, or lightning strike. It is not dull or aching, but very sharp and sudden.
Location and Spread of Pain
It is almost always unilateral (one-sided). The right side is affected slightly more often. It is felt around the eye, cheek, teeth, lips, or jaw.
Pain Duration and Frequency
Attacks last from a few seconds to a few minutes (usually less than 2 minutes).
Diagnosis Methods
Neurological Examination
Facial sensation, muscle strength, and reflexes are evaluated. In classic neuralgia this examination is completely normal. If there is sensory loss, a secondary cause is suspected.
Cranial Magnetic Resonance Imaging (MRI)
The gold standard test. The brainstem, cerebellopontine angle, and nerve pathway are examined. It is routinely requested to rule out tumors, cysts, or MS plaques.
Special MRI Sequences (FIESTA / CISS / 3D-TOF)
These take very high-resolution, millimetric cross-sections. By clearly showing the relationship between the nerve and surrounding vessels, they detect vascular compression (neurovascular conflict).
Neurophysiological Tests
Trigeminal reflex tests (e.g., the blink reflex) can rarely be used as an adjunct to detect electrical conduction abnormalities in the nerve and to differentiate secondary causes.
Causes
Vascular Compression (Neurovascular Conflict)
Blood vessels compressing the trigeminal nerve are the most common cause. These vessels can compress or irritate the nerve between where it exits the brainstem and enters the base of the skull, due to pulsations or pressure changes.
Unknown Causes
In some cases, the underlying cause cannot be identified.
Treatments
First-Line: Sodium Channel Blockers
Carbamazepine (Tegretol) and Oxcarbazepine (Trileptal) are considered the standard and provide dramatic relief during the first attack in the majority of patients.
Second-Line and Adjunctive Treatments
Gabapentin (Neurontin), Pregabalin (Lyrica), Baclofen (Lioresal), and Lamotrigine (Lamictal) are added to treatment or used as alternatives when first-line drugs cannot be tolerated, are insufficient, or cause side effects.
Botulinum Toxin (Botox) Injections
A minimally invasive option in resistant cases that can offer longer-lasting pain control in some patients.
Microvascular Decompression (MVD - Jannetta Procedure)
The only cause-oriented surgical method that eliminates the underlying cause (the vessel's pressure on the nerve) and provides anatomical repair, aiming to preserve nerve function.
Gamma Knife Radiosurgery
Not a surgery with a blade in the classical sense, but an ablative method that aims to create controlled damage (a lesion) in the nerve using targeted high-dose radiation.
Percutaneous Ablative Procedures (Radiofrequency, Balloon Compression)
Minimally invasive (needle-based) ablative procedures preferred for patients who cannot undergo MVD and have pain too severe to wait for the effects of Gamma Knife.
Prevention
Accurate Diagnosis and Source Identification
The nature of the pain is the greatest clue to its source. Tingling and electric shocks indicate neuropathic pain, while aching and throbbing point to nociceptive pain.
Prevention of Unnecessary Investigations
A thorough pain assessment clarifies the area of focus and eliminates redundant radiological imaging or blood tests.
Personalized Treatment Planning
Treatment is planned not only to alleviate the pain but also to address the underlying cause of the pain.
Identifying Red Flags
Questions regarding weight loss or nocturnal pain allow for the early detection of emergencies such as underlying cancer, infection, or severe nerve compression.
Objective Measurement of Treatment Success
Pain scoring (0-10) is the most reliable way to determine if the treatment is effective.
Assessment of Psychosocial Effects
By evaluating the depression, anxiety, and social isolation brought on by chronic pain, holistic support is provided to the patient.