Seizures as the presenting symptom of brain tumors in children.

Epileptic seizures caused by tumors in children have been regarded as uncommon. We have studied 99 consecutive cases of brain tumors during the period 1980-1987. In 20 cases the tumor was localized to one of the hemipheres and 10 of the cases had seizures, in 9 as the only initial symptom. Details of the clinical picture and the course are presented. Delay from initial symptoms to correct diagnosis was considerable in 4 cases--more than six years. The factors mainly responsible for this delay were: initial EEG normal or soon normalized, misinterpretation of computerized tomography and seizure freedom with or without antiepileptic drug treatment. We conclude that regional slowing in the EEG is a common, although not obligatory, finding. Computerized tomography should be performed in all children with newly presented epilepsy of partial type, except for those with benign partial epilepsy with centro-temporal spikes.