title: Ipsilateral Hemichorea-hemiballism in a Case of Postoperative Stroke.
abstract: BACKGROUND
  Ipsilateral hemiballismus refers to the rare occurrence of hemiballism developing on the same side of a brain lesion.
  
  
  METHODS
  We describe a rare case of postoperative ipsilateral hemiballism in a patient who underwent pituitary adenoma resection and experienced a right internal cerebral artery territory infarct. We review the literature on hemichorea hemiballismus (HCHB) and explore various mechanisms for its occurrence.
  
  
  CONCLUSIONS
  Only three cases of ipsilateral hemiballism have been described, and the exact pathophysiology remains unknown. A dominant left hemisphere with corpus callosal connections to the right basal ganglia is the most probable explanation for this unusual event.
authors.affiliation: Department of Neurosurgery, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India.
authors.forename: Narasinga Rao V L
authors.initials: NR
authors.lastname: Kannepalli
authors.affiliation: Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India.
authors.forename: Ravi
authors.initials: R
authors.lastname: Yadav
authors.affiliation: Department of Neurosurgery, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India.
authors.forename: Vikas
authors.initials: V
authors.lastname: Vazhayil
authors.affiliation: Department of Neurosurgery, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India.
authors.forename: Sampath
authors.initials: S
authors.lastname: Somanna
authors.affiliation: Department of Neurology, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India.
authors.forename: Pramod Kumar
authors.initials: PK
authors.lastname: Pal
keywords: Hemiballismus; hemichorea; pituitary adenoma; stroke; surgery