Abstract
We present our experience with Gamma Knife surgery (GKS) and refractory glossopharyngeal neuralgia (GPN), analyzing its usefulness and safety in patients with or without previous surgeries, another concomitant neuralgia, or retreats. In addition, we study some factors that could condition the outcome of this technique. According to our review, our follow-up is the longest in the literature. We performed the prospective study of 8 patients submitted to GKS between 2008 and 2020. We employed the Leksell radiosurgery Gamma Knife system. The cases were evaluated before and after surgery (3, 6, 12 months and then annually). The VAS (Visual Analogue Scale) and BNI (Barrow Neurological Institute) scale were used. The data were assessed with SPSS25. Our series was composed of 6 (75%) women and 2 (25%) men, with an average age of 59.5 ± 14.04 years. Six patients (75%) had one or more than one previous surgeries. The median follow-up time was 7.22 ± 3.66 years (1.08–12.5 years). In the short-term postoperative period (1 year), eight patients (100%) experienced significant pain relief (VAS, p = 0.012; BNI I–IIIb). After the last interview, 5 patients felt pain relief (62.5%) (BNI grade I = 3; BNI grade IIIa = 2); 3 patients (37.5%) (BNI grade IV) were retreated (MVD, 2; GKS, 1). We found no association between patients with long evolution time of disease (p = 0.356), previous surgeries (p = 0.206), or vascular contact (p = 0.673) and worse clinical results after GKS. Both morbidity and mortality were 0%. Our results suggest that GKS for treating drug-resistant GPN with high initial doses is both a minimally invasive and useful and effective therapeutic strategy, without permanent complications. It presents good results even in patients with one or more previous surgical interventions. These findings encourage us to use this non-invasive technique as initial therapy against the invasive options.
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Monica Lara-Almunia, M.D, Ph.D.: writing, data collection, analysis.
Nuria E. Martinez Moreno, M.D, Ph.D.: data collection.
Jorge Gutierrez Sarraga, Ph.D.: data collection.
Roberto Martinez Alvarez, M.D, Ph.D.: critical review.
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Lara-Almunia, M., Moreno, N.E.M., Sarraga, J.G. et al. Gamma Knife radiosurgery and refractory glossopharyngeal neuralgia: a single-center series with long-term follow-up. Neurosurg Rev 45, 525–531 (2022). https://doi.org/10.1007/s10143-021-01557-7
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DOI: https://doi.org/10.1007/s10143-021-01557-7