• Marie Miquel, Umberto Spampinato, Chrystelle Latxague, Iciar Aviles-Olmos, Benedikt Bader, Kelly Bertram, Kailash Bhatia, Pierre Burbaud, Lothar Burghaus, Jin Whan Cho, Emmanuel Cuny, Adrian Danek, Thomas Foltynie, Pedro J Garcia Ruiz, Santiago Giménez-Roldán, Dominique Guehl, Jorge Guridi, Marwan Hariz, Paul Jarman, Zinovia Maria Kefalopoulou, Patricia Limousin, Nir Lipsman, Andres M Lozano, Elena Moro, Dhita Ngy, Maria Cruz Rodriguez-Oroz, Huifang Shang, Hyeeun Shin, Ruth H Walker, Fusako Yokochi, Ludvic Zrinzo, and François Tison.
• Service de Neurologie, CHU Bordeaux, Bordeaux, France ; Service de Neurologie, CH François Mitterrand, Pau, France.
• Plos One. 2013 Jan 1; 8 (11): e79241.

BackgroundChorea-acanthocytosis (ChAc) is a neuroacanthocytosis syndrome presenting with severe movement disorders poorly responsive to drug therapy. Case reports suggest that bilateral deep brain stimulation (DBS) of the ventro-postero-lateral internal globus pallidus (GPi) may benefit these patients. To explore this issue, the present multicentre (n=12) retrospective study collected the short and long term outcome of 15 patients who underwent DBS.MethodsData were collected in a standardized way 2-6 months preoperatively, 1-5 months (early) and 6 months or more (late) after surgery at the last follow-up visit (mean follow-up: 29.5 months).ResultsMotor severity, assessed by the Unified Huntington's Disease Rating Scale-Motor Score, UHDRS-MS), was significantly reduced at both early and late post-surgery time points (mean improvement 54.3% and 44.1%, respectively). Functional capacity (UHDRS-Functional Capacity Score) was also significantly improved at both post-surgery time points (mean 75.5% and 73.3%, respectively), whereas incapacity (UHDRS-Independence Score) improvement reached significance at early post-surgery only (mean 37.3%). Long term significant improvement of motor symptom severity (≥ 20 % from baseline) was observed in 61.5 % of the patients. Chorea and dystonia improved, whereas effects on dysarthria and swallowing were variable. Parkinsonism did not improve. Linear regression analysis showed that preoperative motor severity predicted motor improvement at both post-surgery time points. The most serious adverse event was device infection and cerebral abscess, and one patient died suddenly of unclear cause, 4 years after surgery.ConclusionThis study shows that bilateral DBS of the GPi effectively reduces the severity of drug-resistant hyperkinetic movement disorders such as present in ChAc.

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