title: Hemiballism after subthalamotomy in patients with Parkinson's disease: report of 2 cases.
abstract: The occurrence of persistent hemiballism after subthalamotomy for Parkinson's disease (PD) has not been described as frequently as mild or transient dyskinesia. We report on 2 patients with advanced PD who developed hemiballism and/or dyskinesia after subthalamotomy. One patient with a small lesion confined to the subthalamic nucleus (STN) developed persistent hemiballism; the other with a larger lesion involving the STN and also the zona incerta presented with a transient dyskinesia in a single limb. We conclude that a precise STN lesion might bear a potential risk of persistent hemiballism.
authors.affiliation: Movement Disorders Unit, Chang Gung Memorial Hospital and Medical College, Chang Gung University, Lin-Ko, Taoyuan, Taiwan, Republic of China.
authors.forename: Chiung-Chu
authors.initials: CC
authors.lastname: Chen
authors.forename: Shih-Tseng
authors.initials: ST
authors.lastname: Lee
authors.forename: Tony
authors.initials: T
authors.lastname: Wu
authors.forename: Chi-Jen
authors.initials: CJ
authors.lastname: Chen
authors.forename: Chin-Chang
authors.initials: CC
authors.lastname: Huang
authors.forename: Chin-Song
authors.initials: CS
authors.lastname: Lu
mesh_terms: D002819:Chorea / Q000175:diagnosis; D020820:Dyskinesias / Q000175:diagnosis*; D004564:Electrocoagulation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009460:Neurologic Examination; D010300:Parkinson Disease / Q000175:diagnosis / Q000601:surgery*; D011183:Postoperative Complications / Q000175:diagnosis*; D020531:Subthalamic Nucleus / Q000473:pathology / Q000601:surgery*; D020530:Subthalamus / Q000473:pathology