Medically intractable epilepsies of tumoural aetiology. Report of 4 cases treated according to the method described by J. Talairach et al.

The authors present 4 patients with medically uncontrollable epilepsy of tumoural aetiology (grade I-II gliomas). In two of them, CT scan showed probable neoplastic lesions, located deeply in the left frontal and right temporal lobes respectively, reflected in the SEG studies only in the second case. The other two were patients with left frontal gliomas in whom seizures did not disappear after removal of the tumour. After SEEG studies defined the epileptogenic zone and the lesion and these were removed, complete suppression of the seizures was achieved in two patients and the other two only unfrequently suffered seizures. We emphasize the importance of SEEG studies for success in treating patients with gliomata previously diagnosed by CT scan, and who have seizures uncontrolled by anticonvulsants as the only symptom.