title: Linear accelerator radiosurgery for trigeminal neuralgia.
abstract: OBJECTIVE
  To report the clinical outcomes following treatment of trigeminal neuralgia with linear accelerator-based radiosurgery.
  
  
  METHODS
  Twenty-eight patients with medication refractory idiopathic trigeminal neuralgia were treated with a single fraction of 80 Gy to the trigeminal nerve root. For treatment delivery, a 4-mm collimator and a 7-arc technique were delivered using a stereotactic floor stand system with an isocenter stability of 0.2 +/- 0.1 mm to minimize dose to the brainstem. Treatment delivery time was approximately 55 minutes.
  
  
  RESULTS
  With a median follow-up of 12 months (range, 1-40 mo), 57% of patients achieved complete pain relief and 75% (exact 95% confidence interval, 55 to 89%) had their pain reduced to 3 or less on a 10-point pain scale. Median time to pain relief was 1 month. Four patients did not respond to treatment. The actuarial mean time to pain recurrence in responders was 14 months, and the actuarial mean response duration in major to complete responders was 16 months. Women had significantly longer mean time to pain recurrence than men (16 versus 7 months; P = 0.05). Three patients reported new mild facial numbness after radiosurgery and one patient developed neurotrophic keratopathy.
  
  
  CONCLUSIONS
  Linear accelerator-based radiosurgery for medication refractory trigeminal neuralgia provides effective pain relief with a low complication rate.
authors.affiliation: Department of Human Oncology, University of Wisconsin Medical School, K4/B29 Clinical Sciences Center, Madison, Wisconsin 53792, USA. richards@humonc.wisc.edu
authors.forename: Gregory M
authors.initials: GM
authors.lastname: Richards
authors.forename: Kristin A
authors.initials: KA
authors.lastname: Bradley
authors.forename: Wolfgang A
authors.initials: WA
authors.lastname: Tomé
authors.forename: Søren M
authors.initials: SM
authors.lastname: Bentzen
authors.forename: Daniel K
authors.initials: DK
authors.lastname: Resnick
authors.forename: Minesh P
authors.initials: MP
authors.lastname: Mehta
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005145:Face / Q000528:radiation effects; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006987:Hypesthesia / Q000209:etiology; D008297:Male; D008875:Middle Aged; D010166:Palliative Care; D010315:Particle Accelerators; D016634:Radiosurgery / Q000009:adverse effects; D012008:Recurrence; D012189:Retrospective Studies; D013238:Stereotaxic Techniques; D013997:Time Factors; D016896:Treatment Outcome; D014277:Trigeminal Neuralgia / Q000503:physiopathology / Q000601:surgery*