Etiology of symptomatic cases N (%)
Perinatal asphyxia 5 (55.6)
Tuberous sclerosis 1 (11.1)
Mitochondrial encephalomyopathy 1 (11.1)
Meningoencephalitis 1 (11.1)
Parietal cortical dysplasia 1 (11.1)
  Total 9 (100)
Table 3: Principals etiologies found in our serie in symptomatic cases.