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  • Title: Unilateral Thalamic Deep Brain Stimulation Versus Focused Ultrasound Thalamotomy for Essential Tremor.
    Author: Harary M, Segar DJ, Hayes MT, Cosgrove GR.
    Journal: World Neurosurg; 2019 Jun; 126():e144-e152. PubMed ID: 30794976.
    Abstract:
    BACKGROUND: The predominant neurosurgical approach to medication-refractory essential tremor is thalamic deep brain stimulation (DBS). The emergence of magnetic resonance-guided focused ultrasound (MRgFUS) thalamotomy has reawakened the debate surrounding the use of DBS versus thalamotomy for this indication. Herein, we aimed to provide a contemporary comparison between DBS and MRgFUS. METHODS: Two controlled trials that evaluated DBS and MRgFUS for the unilateral treatment of refractory essential tremor were compared. Clinical outcomes extracted included postural tremor score in the treated upper extremity, quality of life (QoL), and incidence of adverse events (AE). RESULTS: Baseline patient characteristics were comparable in the 2 studies, except that DBS patients were younger and had more severe baseline tremor. Both DBS- and MRgFUS-treated patients had significant tremor improvement that was sustained for 1-year posttreatment, and significant improvement in QoL. The MRgFUS cohort had higher rates of persistent neurologic AE, whereas the DBS group had higher rates of surgery- and hardware-related AEs, including intracranial hemorrhage. CONCLUSIONS: In context of prior literature, both DBS and MRgFUS significantly improve tremor control and QoL. The 2 approaches are predominantly differentiated by their AE-profile. Additional head-to-head comparison on matched clinical populations are required to more accurately compare clinical efficacy and long-term outcomes.
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