title: Asymmetrical ventricular enlargement in Parkinson's disease.
abstract: Parkinson's disease (PD) typically manifests with asymmetric motor symptom onset. Ventricular enlargement, a nonspecific measure of brain atrophy, has been associated with cognitive decline in PD, but not with motor symptom asymmetry. Asymmetrical ventricular enlargement on magnetic resonance images was explored in a monozygotic twin pair discordant for PD and in nine healthy monozygotic twin pairs. The left-right lateral ventricular volumetric difference of the PD-twin was greater than that of his twin and all other healthy twins, with the larger ventricle observed contralateral to the more symptomatic side. Moreover, the lateral ventricle asymmetry difference between twin pairs was significantly higher for the discordant PD-twin pair than for the healthy twin pairs. This is the first report to suggest the presence of asymmetrical ventricular enlargement in PD, findings that may be worthy of further study.
authors.affiliation: Department of Neurology, School of Medicine, University of North Carolina, Chapel Hill, North Carolina 27599-7025, USA, and University Hospital, Vancouver, British Columbia, Canada. xuemei@med.unc.edu
authors.forename: Xuemei
authors.initials: X
authors.lastname: Huang
authors.forename: Yueh Z
authors.initials: YZ
authors.lastname: Lee
authors.forename: Martin
authors.initials: M
authors.lastname: McKeown
authors.forename: Guido
authors.initials: G
authors.lastname: Gerig
authors.forename: Hongbin
authors.initials: H
authors.lastname: Gu
authors.forename: Weili
authors.initials: W
authors.lastname: Lin
authors.forename: Mechelle M
authors.initials: MM
authors.lastname: Lewis
authors.forename: Sutapa
authors.initials: S
authors.lastname: Ford
authors.forename: Alexander I
authors.initials: AI
authors.lastname: Tröster
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Weinberger
authors.forename: Martin
authors.initials: M
authors.lastname: Styner
mesh_terms: D000328:Adult; D002552:Cerebral Ventricles / Q000473:pathology*; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000473:pathology*; D018433:Twin Studies as Topic