Stereotactic Thalamotomy for Medically Intractable Essential Tremor

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Abstract
Objective surgical symptomatic outcome of ventrolateral (VL) thalamotomy specifically for essential tremor is uncommonly reported and functional outcome has not been investigated previously. In the present series, 7 patients underwent unilateral and 1 patient staged bilateral VL thalamotomies for disabling medically refractory essential tremor. At follow-up examination (mean 17.3 months, range 1–50 months), all patients enjoyed complete ablation or significant amelioration of the targeted tremor. Disability as determined by a modified form of an established rating scale for tremor was reduced from moderate (57%) or severe (43%) to absent (86%) or mild (14%). Interestingly, voice tremor was ablated or significantly improved in 71.4% of patients with preoperative voice tremor.

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