Hemichorea associated with cavernous angioma and a small errhysis: A case report and literature review

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Chorea is a movement disorder characterized by randomly appearing involuntary movements of the face, neck, limbs, or trunk. Hemichorea is unilateral, involving one side of the body. Hemichorea is commonly caused by non-ketotic hyperglycemia and/or cerebrovascular injury to the contralateral basal ganglia.

Patient concerns:

Here, we report the case of a patient diagnosed with hemichorea who had diabetes, cavernous angioma, and a small intracranial errhysis. Routine testing showed the patient's blood glucose level was slightly higher than the normal range.


The errhysis was too small to be treated.


Brain magnetic resonance imaging showed a cavernous angioma with a small errhysis in the right putamen.


Hemichorea was completely resolved after 4 months.


If diabetes is well controlled and imaging indicates brain lesions suggestive of a recent stroke, a diagnosis of post-stroke hemichorea should be considered.

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