RT Journal Article
SR Electronic
T1 Subthalamotomy for Parkinson’s disease: clinical outcome and topography of lesions
JF Journal of Neurology, Neurosurgery & Psychiatry
JO J Neurol Neurosurg Psychiatry
FD BMJ Publishing Group Ltd
SP 572
OP 578
DO 10.1136/jnnp-2017-316241
VO 89
IS 6
A1 Rafael Rodriguez-Rojas
A1 Maylen Carballo-Barreda
A1 Lazaro Alvarez
A1 Jorge Guridi
A1 Nancy Pavon
A1 Ivan Garcia-Maeso
A1 Raul Mací­as
A1 Maria C Rodriguez-Oroz
A1 Jose Angel Obeso
YR 2018
UL http://jnnp.bmj.com/content/89/6/572.abstract
AB Objective Subthalamotomy is an effective alternative for the treatment of Parkinson’s disease (PD). However, uncertainty about the optimal target location and the possibility of inducing haemichorea-ballism have limited its application. We assessed the correlation between the topography of radiofrequency-based lesions of the subthalamic nucleus (STN) with motor improvement and the emergence of haemichorea-ballism.Methods Sixty-four patients with PD treated with subthalamotomy were evaluated preoperatively and postoperatively using the Unified Parkinson’s Disease Rating Scale motor score (UPDRSm), MRI and tractography. Patients were classified according to the degree of clinical motor improvement and dyskinesia scale. Lesions were segmented on MRI and averaged in a standard space. We examined the relationship between the extent of lesion-induced disruption of fibres surrounding the STN and the development of haemichorea-ballism.Results Maximum antiparkinsonian effect was obtained with lesions located within the dorsolateral motor region of the STN as compared with those centre-placed in the dorsal border of the STN and the zona incerta (71.3%, 53.5% and 20.8% UPDRSm reduction, respectively). However, lesions that extended dorsally beyond the STN showed lower probability of causing haemichorea-ballism than those placed entirely within the nucleus. Tractography findings indicate that interruption of pallidothalamic fibres probably determines a low probability of haemichorea-ballism postoperatively.Conclusions The topography of the lesion is a major factor in the antiparkinsonian effect of subthalamotomy in patients with PD. Lesions involving the motor STN and pallidothalamic fibres induced significant motor improvement and were associated with a low incidence of haemichorea-ballism.