retrospective analysis of various clinical data and eeg abnormalities , determined before the contrast radiological examinations , showed that the following were statistically significantly different between the two groups in favour of a tumoral aetiology for the seizures : age at onset of fits ( greater than 20 years ) , presence of focal neurological signs and increased intracranial pressure , presence of focal unilateral delta waves without accompanying epileptic discharges , beta asymmetry between the cerebral hemispheres and hyperventilation-induced electrical seizures .
C0014544
epileptic
C0036572
seizures