Transient cerebellopontine demyelinisation revealed by MRI in acute cerebellar ataxia

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Abstract
An eight year old boy was admitted to our ward with a history of abrupt onset of rapidly progressive gait disorder, nausea, vertigo and vomiting. The clinical as well as the labortory findings suggested the diagnosis of acute cerebellar ataxia. Magnetic resonance imaging (MRI), however, showed marked demyelinisation in the cerebellar region and visual evoked potentials were pathologic. After immunosuppression the patient promptly improved clinically and the lesions depicted by MRI disappeared almost completely.