MRI and magnetoencephalography features
| Oligodendrocytosis (n = 18) | FCD I (n = 21) | Oligodendrocytosis + FCD I (n = 7) | P Value | |
|---|---|---|---|---|
| MRI features | ||||
| High T1 in cortex (%) | 5 (27.8) | 4 (19.0) | 3 (42.9) | .44 |
| High T2/FLAIR in cortex (%) | 2 (11.1) | 6 (28.6) | 1 (14.3) | .40 |
| High T2/PD/FLAIR in subcortical white matter (%) | 13 (72.2) | 14 (66.7) | 6 (85.7) | .57 |
| Increased cortical thickness (%) | 0 (0) | 3 (14.3) | 2 (28.6) | .10 |
| Blurring of gray-white matter junction (%) | 3 (16.7) | 3 (14.3) | 3 (42.9) | .24 |
| Abnormal sulcation and gyration pattern (%) | 1 (5.6) | 0 (0) | 2 (28.6) | .03 |
| MEG features | ||||
| MEGSS cluster (%) | 12 (66.7) | 18 (85.7) | 5 (71.4) | .19 |
| Concordance of MEGSS cluster with surgical resection (%) | 12 (100) | 17 (94.4) | 5 (100) | .30 |
| Peak of MEGSS leading peak of EEG spike (%) | 9 (50.0) | 14 (66.7) | 5 (71.4) | .19 |
| Spike and wave (%) | 10 (55.6) | 14 (66.7) | 4 (57.1) | .65 |