Hyperhidrosis due to deep brain stimulation in a patient with essential tremor

Case report

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✓The authors present a unique case of hyperhidrosis as a side effect of a misplaced deep brain stimulation (DBS) electrode near the ventrointermedius (Vim) nucleus in a patient with essential tremor. Magnetic resonance imaging of the brain showed electrode placement in the left anterior thalamus traversing the hypothalamus. High-frequency electrical stimulation possibly resulted in unilateral activation of the efferent sympathetic pathways in the zona incerta. Although a rare complication, hypothalamic dysfunction may occur as a stimulation-related side effect of Vim-DBS.

Abbreviations used in this paper:DBS = deep brain stimulation; ET = essential tremor; PD = Parkinson disease; Vim = ventrointermedius; ZI = zona incerta.
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Contributor Notes

Address correspondence to: Joseph Jankovic, M.D., Parkinson's Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, 6550 Fannin Street, Suite 1801, Houston, Texas 77030. email: josephj@bcm.tmc.edu.
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