• Neurosurgery · Feb 2019

    Multicenter Study

    Stereotactic Radiosurgery for Trigeminal Neuralgia in Patients With Multiple Sclerosis: A Multicenter Study.

    • Zhiyuan Xu, David Mathieu, France Heroux, Mahmoud Abbassy, Gene Barnett, Alireza M Mohammadi, Hideyuki Kano, James Caruso, Han-Hsun Shih, Inga S Grills, Kuei Lee, Sandeep Krishnan, Anthony M Kaufmann, Lee John Y K JYK Department of Neurosurgery, Otolaryngology, Univer-sity of Pennsylvania, Philadelphia, Pennsylvania., Michelle Alonso-Basanta, Marie Kerr, John Pierce, Douglas Kondziolka, Judith A Hess, Jason Gerrard, Veronica Chiang, L Dade Lunsford, and Jason P Sheehan.
    • Department of Neurosurgery, Univer-sity of Virginia, Charlottesville, Virginia.
    • Neurosurgery. 2019 Feb 1; 84 (2): 499-505.

    BackgroundFacial pain response (PR) to various surgical interventions in patients with multiple sclerosis (MS)-related trigeminal neuralgia (TN) is much less optimal. No large patient series regarding stereotactic radiosurgery (SRS) has been published.ObjectiveTo evaluate the clinical outcomes of MS-related TN treated with SRS.MethodsThis is a retrospective cohort study. A total of 263 patients contributed by 9 member tertiary referral Gamma Knife centers (2 in Canada and 7 in USA) of the International Gamma Knife Research Consortium (IGKRF) constituted this study.ResultsThe median latency period of PR after SRS was 1 mo. Reasonable pain control (Barrow Neurological Institute [BNI] Pain Scores I-IIIb) was achieved in 232 patients (88.2%). The median maintenance period from SRS was 14.1 months (range, 10 days to 10 years). The actuarial reasonable pain control maintenance rates at 1 yr, 2 yr, and 4 yr were 54%, 35%, and 24%, respectively. There was a correlation between the status of achieving BNI-I and the maintenance of facial pain recurrence-free rate. The median recurrence-free rate was 36 mo and 12.2 mo in patients achieving BNI-I and BNI > I, respectively (P = .046). Among 210 patients with known status of post-SRS complications, the new-onset of facial numbness (BNI-I or II) after SRS occurred in 21 patients (10%).ConclusionIn this largest series SRS offers a reasonable benefit to risk profile for patients who have exhausted medical management. More favorable initial response to SRS may predict a long-lasting pain control.

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