[Convulsion associated with mild gastroenteritis: occurrence in identical twins on the same day]

We reported identical twin cases having convulsion associated with mild gastroenteritis almost simultaneously. The patients were 14-month-old boys. They suffered from vomiting from one day before the onset of convulsion. Convulsions occurred firstly in the first twin, and then in the second one immediately after the convulsion of the first one. The twins experienced 6 and 4 convulsions respectively, although they were treated with diazepam and phenobarbital. An ictal EEG of the second twin revealed a focal paroxysmal discharge in the right occipital area spreading rapidly to all areas. During the follow-up period, no recurrence of seizures was observed and psychomotor development was normal in both of them.