Late detection of neuroblastoma in a patient with prolonged cerebellar ataxia without opsoclonus

A 19-month-old boy presented with acute-onset cerebellar ataxia following i mmunisation. Ataxia was prolonged with a fluctuating course over a period o f two years. Opsoclonus was never observed. Extensive diagnostic studies we re negative during this time. Finally, a neuroblastoma was discovered. Atax ia disappeared completely during polychemotherapy. This report suggests tha t occult neuroblastoma must be considered in any child with unexplained pro longed cerebellar ataxia, Specific investigations are recommended for such cases.