Myoclonic seizures as a main manifestation of Epstein-Barr virus infection.

A 15-year-old girl with clinical and serologic evidence of active Epstein-Barr virus infection presented with a new onset of myoclonic jerks, confirmed on electroencephalogram (EEG) by generalized polyspike-and-wave epileptiform activity. Family history for juvenile myoclonic epilepsy was negative, and brain magnetic resonance imaging was normal. The myoclonic jerks resolved spontaneously after 5 days, with gradual normalization of the EEG during the ensuing month and since then no resumption over the last 2 years. Previous reports have already linked Epstein-Barr virus infection to opsoclonus-myoclonus syndrome and hypsarrhythmia, but to the best of our knowledge, this is the first presentation of epileptic myoclonic jerks associated with acute Epstein-Barr virus infection. We suggest that acute myoclonic seizures with a transiently abnormal EEG and benign course can be associated with acute Epstein-Barr virus infection.