Résumé
La névralgie trigéminale, bien que qualifiée d’essentielle, est due dans une grande majorité de cas (96 %) à une compression vasculaire au niveau de la racine trigéminale. Cette compression pulsatile entraîne des lésions de démyélinisation responsables de foyers d’influx ectopiques qui sont à l’origine de douleurs paroxystiques intenses. La décompression vasculaire microchirurgicale (DVMC) consiste – après constatation à l’imagerie d’un (probable) conflit vasculaire – à lever la compression. L’intervention, d’une durée de 3h environ, est réalisée sous anesthésie générale. L’étude des résultats montre une efficacité, avec sédation complète des douleurs à long terme, dans 62 % à 89 % des cas selon les séries. La DVMC est une chirurgie curative et conservatrice qui traite la cause des douleurs et pour laquelle les résultats à long terme sont le plus souvent durables et stables, comme le montrent les études statistiques sur courbe de Kaplan-Meyer à 16 ans. C’est la première option chirurgicale lorsque les traitements médicamenteux sont insuffisants ou mal supportés et lorsque l’imagerie met en évidence une compression vasculaire.
Abstract
Trigeminal neuralgia is, in a large majority of cases (96%), due to a neurovascular compression at the level of the trigeminal root. Chronic pulsatile compression creates focal demyelination, with short-circuits between fibers and generation of ectopic influxes responsible for intense paroxysmal pain. Microvascular decompression (MVD), in those cases in whom high-resolution MRI shows evidence of a neurovascular compression, obtains long-term relief in a significant number of patients, 62% to 89% of the cases according to series. MVD, because it is a curative and conservative treatment of TN, is the first surgical option. Lesioning techniques with percutaneous approaches or stereotactic radiosurgical methods are alternatives for patient with precarious general conditions or in whom MRI cannot demonstrate neurovascular compression.
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Sindou, M., Antherieu, P. & Nuti, C. Traitement de la névralgie trigéminale essentielle par décompression vasculaire microchirurgicale. Douleur analg 28, 131–138 (2015). https://doi.org/10.1007/s11724-015-0428-x
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DOI: https://doi.org/10.1007/s11724-015-0428-x