Evaluation of surgical treatment outcome in epilepsy.

Seven recent papers are reviewed for outcomes following epilepsy surgery. The criteria of outcome assessment are analyzed and compared. All studies agree in indicating that the combination of the classic evaluation of seizure frequency with that of quality of life is required for a comprehensive view of the surgical outcome. However, the assessment modalities and outcome scales proposed present relevant differences. The need for standardization is apparent. A surgical outcome scoring system using multiple measures is recommended. The outcome evaluation should be performed not sooner than 2 years after surgery. The most relevant of the many variables of the outcome should be selected in such a way as to permit assessment of the epileptological response to surgery as well as the changes in the quality of life.