Surgical treatment for epilepsy remains highly underutilized: in the United States, there has been no increase in the number of surgical procedures performed annually since 1990 1 ; for most patients referred, the average duration of epilepsy is 22 years 2 ; and there has been no change in this delay to surgery 3 , despite two randomized controlled trials 4, 5 and an American Academy of Neurology practice parameter that recommended surgery as the treatment of choice for medically refractory temporal lobe epilepsy 6 . This session addressed issues relevant to increasing the availability of epilepsy surgery, particularly in countries with limited resources.
Who should be referred for surgical therapy?Two-thirds of patients with epilepsy have epileptic seizures that are easily controlled by antiseizure drugs. Of the remainder, causes of apparent pharmacoresistance include noncompliance, seizures that are not epileptic, misdiagnosis of the type of epilepsy condition, prescription of the wrong antiseizure drug or the wrong regimen and dosage, and lifestyle issues that lower seizure threshold or provoke ictal events.The International League against Epilepsy has proposed that drug-resistant epilepsy should be defined as "failure of adequate drug trials of two tolerated, appropriately chosen and used antiepileptic drugs (whether as monotherapy or in combination) to achieve sustained seizure freedom" 7 . Studies have shown that after failure of two appropriate drug trials, only 3 % of patients eventually become seizure free 8 .It is recommended, therefore, that patients meeting this definition of drug-resistant epilepsy should be referred to an epilepsy center with specialized epileptologists, who can identify specific epilepsy syndromes, distinguish them from psychogenic non-epileptic seizures and other non-epileptic events, diagnose underlying treatable causes, use specialized pharmacologic approaches, address disabling psychosocial problems, and consider alternative treatments such as vagus nerve stimulation, ketogenic diet, behavioral therapies, and surgery. Rather than asking who should be referred for surgical therapy, neurologists