| Etiologies | No. (percent) |
| Tuberous sclerosis (includes one with hemimegalencephaly) | 3 (16.66) |
| Mitochondrial diseases | 3 (16.66) |
| Lissencephaly with heterotopia and polymicrogyria | 3 (16.66) |
| Hypoxic-ischemic encephalopathy (HIE) sequela (one case had Williams syndrome) | 2 (11.11) |
| Trisomy 21 | 2 (11.11) |
| Trisomy 15 | 1 (5.56) |
| Meningitis with infarct | 1 (5.56) |
| Frontal heterotopia | 1 (5.56) |
| Congenital hypothyroidism | 1 (5.56) |
| Septo-optic dysplasia | 1 (5.56) |