Engel class
Epilepsy surgery outcome Class I Free of disabling seizures A: completely seizure-free since surgery B: nondisabling simple partial seizures only since surgery C: some disabling seizures after surgery, bur free of disabling seizures for at least 2 years Class II Rare disabling seizures ("almost seizure free") A: initially free of disabling seizures but has rare seizures now B: rare disabling seizures since surgery C: more than rare disabling seizures since surgery, but rare seizures for the last 2 years D: nocturnal seizures only Class III Worthwile improvement (requires additional data on seizure incidence and quality of life) A: worthwile seizure reduction B: prolonged seizure-free intervals amounting to greater than half the followed-up period, but not < 2 years Class IV No worthwile improvement A: significant seizure reduction B: no appreciable change C: seizures worse Reference Wieser HG, Blume WT, Fish D, Goldensohn E, Hufnagel A, King D, et al. ILAE Commission Report. Proposal for a new classification of outcome with respect to epileptic seizures following epilepsy surgery. In: Epilepsia. 2001. p. 282-286. |