Table 2.
Surgery Outcome in Nonlesional Temporal vs Extratemporal Cases: Noninvasive vs Invasive Monitoring; Normal Histopathologic Findings vs Nonspecific Reactive Gliosis
| Nonlesional cohort | Seizure outcome | |||
| N | Engel I 1 y (%) | Engel I 2 y (%) | Engel I 5 y (%) | |
| All | 217 | 47.4 | 40.0 | 36.3 |
| Temporal | 150 | 58.1 | 47.3 | 41.0 |
| No iEEG | 50 | 71.4 | 60.9 | 50.0 |
| iEEG | 100 | 51.5 | 41.1 | 36.4 |
| Normal histopathologic findings | 38 | 57.9 | 55.6 | 44.1 |
| Nonspecific reactive gliosis | 112 | 58.1 | 44.2 | 38.8 |
| Hippocampectomy | 60a | 63.3 | 54.0 | 52.0 |
| No hippocampectomy | 23a | 39.1 | 28.5 | 25.0 |
| Extratemporal | 67 | 22.4 | 20.9 | 16.4 |
| No iEEG | 10 | 30.0 | 20.0 | 20.0 |
| iEEG | 57 | 21.1 | 21.1 | 15.7 |
| Normal histopathologic findings | 28 | 35.7 | 32.0 | 25.0 |
| Nonspecific reactive gliosis | 39 | 12.8 | 12.8 | 12.8 |
a
No definitive data on type of surgery (hippocampectomy yes or no) could be retrieved in 67 patients.