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Published on: December 13, 2017
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Gamma Knife Thalamotomy for Essential Tremor: A Retrospective Analysis
Shiro Horisawa1, Motohiro Hayashi1, Noriko Tamura1
1Department of Neurosurgery, Tokyo Women's Medical University, Tokyo, Japan.
World Neurosurgery
|March 13, 2023
Summary
Gamma knife (GK) thalamotomy effectively treats essential tremor (ET), significantly improving tremor, handwriting, and drawing scores. However, careful planning is crucial to minimize potential complications associated with this procedure.
Area of Science:
- Neurosurgery
- Neurology
- Radiosurgery
Background:
- Gamma knife (GK) thalamotomy is an established treatment for essential tremor (ET).
- Existing research indicates variability in treatment responses and complication rates for GK thalamotomy in ET patients.
Purpose of the Study:
- To evaluate the efficacy and safety of Gamma knife thalamotomy for essential tremor.
- To assess the impact of GK thalamotomy on tremor severity, handwriting, and drawing tasks in ET patients.
Main Methods:
- Retrospective analysis of 27 patients with essential tremor who underwent GK thalamotomy.
- Evaluation using the Fahn-Tolosa-Marin Clinical Rating Scale for Tremor, handwriting, and spiral drawing.
- Assessment of postoperative adverse events and magnetic resonance imaging findings.
Main Results:
- Significant improvements were observed in postural tremor (55.9%), handwriting (57.6%), and spiral drawing (50%) scores post-GK thalamotomy (P < 0.001).
- Three patients showed no tremor improvement; six experienced adverse effects, including hemiparesis and numbness.
- Two patients had serious complications (hemiparesis, hematoma), and one patient died from aspiration pneumonia secondary to dysphagia.
Conclusions:
- Gamma knife thalamotomy is an effective procedure for essential tremor management.
- Careful treatment planning is essential to mitigate complication risks.
- Predicting radiation complications can enhance the safety and effectiveness of GK treatment for ET.
