We report on a 57 year-old patient with schizophrenia. After a 30 years course of the disease, he developed previous unknown psychopathological symptoms, and therapeutic interventions (neuroleptic drugs and electroconvulsive therapy) failed. Neurological examination and EEG revealed the diagnosis of complex partial epileptic seizures. MRI showed bitemporal localized cerebral lesions. Discussion focusses on generalization of microseizures in deep brain structures, and "kindling effect" of electroconvulsive therapy in a patient with pre-existing cerebral lesions.