Table 3.

Engel’s classification of epilepsy surgery outcome.

Class I: Free of disabling seizures

A Completely seizure free since surgery

B Nondisabling simple partial seizure only since surgery

C Some disabling seizures after surgery but free of disabling seizures at least for two years

D Generalized convulsions with antiepileptic drug withdrawal only

Class II: Rare disabling seizures

A Initially free of disabling seizures but has rare seizures now

B Rare disabling seizures since surgery

C More than rare disabling seizures after surgery, but rare seizures for at least two years

D Nocturnal seizures only

Class III: Worthwhile improvement

A Worthwhile seizure reduction

B Prolonged seizure-free intervals amounting to greater than half the follow-up period, but not

less than two years

Class IV: No worthwhile improvement

A Significant seizure reduction

B No appreciable change

C Seizures worse