Movement disorders have been reported in association with herpes simplex virus (HSV) encephalitis in adults and children. The cause of this complication is unclear, although a number of proposed aetiologies have been suggested, including inadequate antiviral therapy 1–3 , a side effect of anticonvulsants 4 , or a possible postinfectious mechanism 5–8 . A child who presented with severe chorea associated with relapse of HSV encephalitis prompted us to review the clinical features, management, and outcomes of this condition.
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Hargrave et al. (1998) studied this question.
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