TABLE 2.
Histopathology and surgical outcome
| FCD subtype | Histopathology, n (%) | Seizure‐free, n (%) | Ever reported MRI‐negative, n (%) |
|---|---|---|---|
| All | 380 (100%) | 165/252 (65%) | 135/380 (36%) |
| FCD Type I | 42 (11%) | 17/31 (55%) | 17/42 (40%) |
| FCD Type IIA | 118 (31%) | 58/84 (69%) | 55/118 (47%) |
| FCD Type IIB | 199 (52%) | 80/121 (66%) | 55/199 (28%) |
| FCD Type III | 21 (6%) | 10/16 (62%) | 8/21 (38%) |
Histopathology = histopathological diagnosis; Histopathology % = percentage of patients with particular histopathological diagnosis out of the total number of patients with histopathology; Seizure‐free = number of patients with a particular histopathological diagnosis who were seizure‐free out of the total number of patients with FCD subtype and outcome data available; n = number of patients.
Abbreviations: FCD, focal cortical dysplasia; MRI, magnetic resonance imaging.