title: Transient disabling dyskinesias: a predictor of good outcome in subthalamic nucleus deep brain stimulation in Parkinson's disease.
abstract: We report 5 of 75 (6.6%) patients with Parkinson's disease (PD) submitted to subthalamic nucleus deep brain stimulation (STN-DBS) who developed transient disabling dyskinesias immediately after surgery. Dyskinesias persisted despite levodopa withdrawal, cessation or reduction of stimulation, and resolved spontaneously in a maximum period of 12 weeks without the need to change stimulation active contact. Compared to the rest of our PD patients submitted to STN-DBS, the dyskinesia group needed a lower levodopa-equivalent daily dosage (LEDD) over the time of follow-up. A microlesion in the STN, probably concealed in cerebral MRI by the electrode-related artifact, could have been involved in the etiopathology of our patients' symptoms. The presence of transient disabling dyskinesia in PD patients immediately after STN-DBS might be a predictor of good outcome as measured by a decrease in the LEDD needed.
authors.affiliation: Department of Neurology, Faculdade de Medicina da Universidade do Porto, Hospital de São João, Porto, Portugal. miguelfgago@yahoo.com
authors.forename: M F
authors.initials: MF
authors.lastname: Gago
authors.forename: M J
authors.initials: MJ
authors.lastname: Rosas
authors.forename: P
authors.initials: P
authors.lastname: Linhares
authors.forename: M
authors.initials: M
authors.lastname: Ayres-Basto
authors.forename: G
authors.initials: G
authors.lastname: Sousa
authors.forename: R
authors.initials: R
authors.lastname: Vaz
mesh_terms: D000328:Adult; D000978:Antiparkinson Agents / Q000627:therapeutic use; D001921:Brain / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D046690:Deep Brain Stimulation; D020820:Dyskinesias / Q000209:etiology*; D006801:Humans; D007980:Levodopa / Q000627:therapeutic use; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D010300:Parkinson Disease / Q000188:drug therapy / Q000601:surgery*; D011859:Radiography; D012189:Retrospective Studies; D020531:Subthalamic Nucleus / Q000473:pathology / Q000503:physiopathology*; D016896:Treatment Outcome
chemical_list: D000978:Antiparkinson Agents; D007980:Levodopa