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Long-term outcome of ten children with opsoclonus-myoclonus syndrome

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Abstract

Opsoclonus-myoclonus syndrome (OMS) in children is a rare neurological condition with opsoclonus, myoclonus, ataxia and irritability in the first 2 years of life. It can be idiopathic, parainfectious, or paraneoplastic with tumours of the neural crest. Few studies of long-term follow-up after OMS have been published. We investigated the motor, cognitive and behavioural outcome of ten patients (eight girls and two boys) seen between 1987 and 2002. We reviewed the records and reassessed the patients. A ganglioneuroma was found in one patient and a neuroblastoma in another. Tumour resection did not influence the OMS. The age at diagnosis was 10–24 months and the follow-up period 1–17 years (average 6.5 years). The interval between the first signs and symptoms and starting treatment was 2–12 weeks: treatment consisted of different immunosupressants. Remission was achieved within 5 months in seven, and relapses were present in seven of ten. At follow-up, only one child had mild ataxia. IQ testing was performed in nine with scores below 75 in four and above 85 in four. Attention deficit and visuomotor difficulties led to school problems with special needs, also in those three children with normal IQs. Only two children were attending regular schools. Behavioural problems were reported in seven, and speech difficulties were present in five. In conclusion, the long-term outcome in our patients with OMS was dominated by cognitive and behavioural problems and not by ataxia. Compared with previous reports, our patients were treated earlier. Larger studies and uniform treatment protocols are needed to demonstrate whether early and prolonged immunosupressant therapy has a favourable influence on outcome.

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Abbreviations

OMS:

opsoclonus-myoclonus syndrome

CBCL:

child behaviour checklist

IVIG:

intravenous immunoglobulin

CSA:

cyclosporin A

MRI:

magnetic resonance imaging

IQ:

intelligence quotient

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Authors and Affiliations

  1. Department of Neurology, University Children’s Hospital Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland

    Andrea Klein, Bernhard Schmitt & Eugen Boltshauser

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  1. Andrea Klein
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  2. Bernhard Schmitt
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  3. Eugen Boltshauser
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Correspondence to Andrea Klein.

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Klein, A., Schmitt, B. & Boltshauser, E. Long-term outcome of ten children with opsoclonus-myoclonus syndrome. Eur J Pediatr 166, 359–363 (2007). https://doi.org/10.1007/s00431-006-0247-4

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  • DOI: https://doi.org/10.1007/s00431-006-0247-4

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