Cyberknife Stereotactic Radiosurgery for Trigeminal Neuralgia: A Single-Institution Retrospective Analysis of Clinical Outcomes

Abstract

Abstract Introduction: CyberKnife stereotactic radiosurgery (CKSRS) is recognized as a highly efficient intervention for refractory trigeminal neuralgia (TN). Our study aims to evaluate the clinical outcomes of CKSRS in treating medically refractory TN. By assessing these results, we aim to understand CKSRS efficacy and its potential as an alternative for nonresponsive patients to traditional medical treatments. Methods: In a retrospective study carried out at my institution, 25 patients with refractory TN were treated between 2018 and 2020. Clinical outcomes, including pain control and hypoesthesia/numbness, were assessed at 6, 12, and 24 months after CKSRS. The study employed the Barrow Neurological Institute pain intensity and facial numbness scores acquired through a telephone questionnaire to assess pain relief and the onset of facial hypoesthesia, thus establishing the effectiveness of the treatment. Results: There were 14 male and 11 female patients. Among all the patients, 44% experienced relief from pain and were not on any medication for pain, whereas 52% reported occasional pain that did not require medication at the end of the study period. The adverse effect of CKSRS, facial numbness, was observed in 58% of patients as mild facial numbness and in 44% as bothersome facial numbness. Moreover, a higher dose of CKSRS administered to the trigeminal nerve was associated with statistically significant pain control (P < 0.05). Conclusion: The study concludes that CKSRS is a safe and effective treatment option for refractory TN. It is worth noting that the occurrence or progression of facial hypoesthesia posttreatment was identified as a predictor of prolonged pain relief.