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Stroke after chickenpox
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Up to a third of cases of acute ischaemic stroke in children occur after an episode of chickenpox. Now a retrospective study at Great Ormond Street Hospital, London ( Elena Miravet and colleagues. Developmental Medicine and Child Neurology 2007;49:417–22[Medline] ) has provided more information about the clinical and radiological features of post-varicella stroke.
During the period 1990–2004, 24 children (15 boys) were seen in the paediatric neurology unit having developed arterial ischaemic stroke up to 12 months after an attack of chickenpox. They were aged 2 months to 6 years at the time of the chickenpox and the average interval between chickenpox and stroke was 4 months (range 1 week to 12 months). All children had brain MRI and intracranial magnetic resonance angiography (MRA). Twenty-three presented with acute hemiparesis and one with acute chorea and transient facial weakness.
All 24 children had infarction in
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