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Acute Disseminated Encephalomyelitis in North Indian Children: Clinical Profile and Follow-Up

Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India

Munni Ray, MD

Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India

Sunit Singhi, MD

Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India

Narendra Kumar Khandelwal, MD

Department of Radiodiagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh, India

Acute disseminated encephalomyelitis in children is not uncommon in developing countries, yet there is little systematic documentation of its clinical profile and follow-up. We studied the clinical and neuroradiologic features of acute disseminated encephalomyelitis in 52 consecutive children. Clinical details, magnetic resonance imaging (MRI) findings, and the results of other investigations were recorded, and children were followed up from 6 to 48 months. A repeat MRI was done after 3 to 4 months, and in those with persistent lesions, another MRI was done after 6 to 7 months of discharge. The mean age at presentation was 6.14 ± 3.17 years, 73.1% were male, and 17 children had a history of antecedent infectious illness or vaccination. Most children had a meningoencephalitic presentation, with sudden-onset motor weakness in 76.9% and seizures in 36.5%. Altered sensorium and pyramidal signs were seen in 55.8% and 80.7% of children, respectively. On MRI, scattered T₂-weighted hyperintense lesions were seen, mainly in the subcortical white matter, especially in the parietal (53.8%) and frontal (30.17%) regions. Thalamic, basal ganglia, and callosal lesions were seen in 30.76%, 17.3%, and 13.46% of cases, respectively. Variable contrast enhancement was seen in 48% of those who had contrast MRIs. The response to methylprednisolone was good, with dramatic recovery in 26.9% and marked improvement in 51.9% at discharge. On follow-up, of 44 children, residual smaller MRI lesions were seen in 30. The MRI was repeated at 6 months in children with residual lesions, and it was found that the lesions either disappeared or were significantly reduced after 6 months in 75% of cases. Four children had relapse of acute disseminated encephalomyelitis with new lesions on MRI. All of them responded to methylprednisolone. None of the clinical or neuroradiologic factors at presentation had any significant correlation with relapse. Six months after discharge, no deficits could be found in 61.3% of cases; 15.9% and 4.5% had motor and cognitive deficits, and 9% had multiple deficits. The presentation of pediatric acute disseminated encephalomyelitis in developing countries is similar to that in developed countries. In spite of an aggressive presentation, most children respond well to corticosteroids. MRI lesions disappear or are significantly reduced at 6 months in the majority of cases. (J Child Neurol 2006;21:851—857; DOI 10.2310/7010.2006.00187).

Journal of Child Neurology, Vol. 21, No. 10, 851-857 (2006)
DOI: 10.1177/08830738060210100201


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