Etiological Categorization.
| Etiology | n | (%) |
|---|---|---|
| Unknown | 8 | (15.1) |
| Cryptogenic | 7 | (13.2) |
| Symptomatic | 38 | (71.7) |
| Perinatal asphyxia | 9 | (17) |
| CNS malformation | 10 | (18.9) |
| Tuberous sclerosis | 5 | (9.4) |
| Metabolic | 3 | (5.7) |
| Chromosomal anomaly | 5 | (9.4) |
| Hypomelanosis of Ito | 2 | (3.8) |
| Other | 4 | (7.5) |
| Total | 53 | (100.0) |