Bilateral Striatal Necrosis after Sydenham's Chorea in a 7-Year-Old Boy: A 2-Year Follow-Up

Abstract

Child bilateral striatal necrosis (BSN) is a rare and etiologically heterogeneous condition. An association with group A streptococcus (GAS) infection was previously reported in two cases of BSN in infancy and early childhood. We here report on a 7-year-old boy who developed chorea and dystonia 20 days after symptomatic recovery from Sydenham's chorea. Repeated brain magnetic resonance imaging scans, obtained before, soon after the onset of the post-Sydenham symptoms, and 1 year later were consistent with an evolution from bilateral striatal microbleeding to necrosis, and consequently reduced basal ganglia volume and enlargement of the frontal horns. No support was found for other possible autoimmune, infectious, metabolic, toxic or genetic etiologies for BSN. Prednisone treatment was instituted and continued for 1 year. Two years after the onset of the post-Sydenham symptoms, the child, although much improved, still has generalized dystonic–choreic movements. This case confirms and extends into school age, the link between GAS and BSN.

Keywords

bilateral striatal necrosis - Sydenham's chorea - movement disorder - dystonia - group A streptococcus

• References

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