The opsoclonus-myoclonus syndrome (OMS) is characterized by subacute onset of opsoclonus, a disorder associated with saccadic eye movements causing involuntary, chaotic saccades that occur in all directions in combination with myoclonus of the neck and trunk and sign of cerebellar ataxia, especially related to the inability to stand and walk.
We report herein on a 11-year-old boy complaining of nausea, dizziness and inability of locomotion. One week before visiting our hospital, he had had a fever with a cold. Serological examination certified his fever was due to Mycoplasma pneumoniae infection. Intravenous corticosteroids pulse therapy was very effective and his opsoclonus and inability to stand and walk disappeared.
On diagnosis of OMS and evaluation of the steroid pulse therapy, a neurotological examination (ex. foam posturography) was very useful.
