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MS-Related TN – Percutaneous Procedures Preferred — SCE Neurology MCQ

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HardHeadache & Facial PainMS-Related TN – Percutaneous Procedures PreferredSCE Neurology

A 30-year-old woman with MS presents with bilateral trigeminal neuralgia. MRI brain shows demyelinating lesions at both trigeminal root entry zones. How does this affect the choice of surgical treatment compared with classical TN?

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Correct answer: B — Percutaneous ablative procedures (balloon compression, glycerol rhizolysis, radiofrequency thermocoagulation) are preferred over MVD for MS-related TN — MVD is less effective because the primary pathology is demyelination, not vascular compression

MS-related TN is caused by demyelination at the trigeminal root entry zone rather than vascular compression. Therefore MVD (which addresses vascular compression) is less effective. Percutaneous ablative procedures target the trigeminal ganglion/root directly, providing pain relief regardless of the underlying aetiology. These include: percutaneous balloon compression, glycerol rhizolysis, and radiofrequency thermocoagulation. Success rates are similar to classical TN percutaneous procedures (~70–90% initial pain relief) but recurrence rates may be higher. A: Different approach is needed. C: Multiple surgical options exist. D: Surgical options are available. E: Laser therapy is not standard.

Reference: EAN TN Guidelines (2019); ABN TN Guidelines