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Ipsilateral Hemichorea-hemiballism in a Case of Postoperative Stroke
Narasinga Rao V L Kannepalli1, Ravi Yadav2, Vikas Vazhayil1
1Department of Neurosurgery, National Institute of Mental Health and Neurosciences (NIMHANS), Bangalore, India.
Background:
Ipsilateral hemiballismus refers to the rare occurrence of hemiballism developing on the same side of a brain lesion.
Case Report:
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.
Discussion:
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.
