Classic triad |
Dys/a‐genesis of corpus callosum |
19/20 |
(95%) |
19/20 |
(95%) |
Distinctive chorioretinal lacunae |
NA |
20/20 |
(100%) |
Spasms |
02/20 |
(10%) |
14/15 |
(93%) |
Major features |
Cortical malformations (polymycrogyria, pachgyria, agyria) |
16/17 |
(94%) |
18/20 |
(90%) |
Periventricular and subcortical heterotopia |
15/17 |
(88%) |
18/20 |
(90%) |
Inter‐hemispheric cysts |
20/20 |
(100%) |
20/20 |
(100%) |
Optic disc/nerve coloboma or hypoplasia |
7/11 |
(64%) |
11/20 |
(55%) |
Distorsion of the inter‐hemispheric fissure |
20/20 |
(100%) |
20/20 |
(100%) |
Supporting features |
Ventriculomegaly (>10 mm) |
14/20 |
(70%) |
14/20 |
(70%) |
Cerebral hemispheric asymmetry |
14/20 |
(70%) |
16/20 |
(80%) |
Microphtalmia |
7/11 |
(64%) |
9/20 |
(45%) |
Posterior fossa abnormalities |
7/20 |
(35%) |
7/20 |
(35%) |
Vertebral and costal abnormalities |
4/20 |
(20%) |
7/20 |
(35%) |
Vascular malformations or tumor |
1/20 |
(5%) |
1/20 |
(5%) |
Facial dysmorphic features |
4/10 |
(40%) |
20/20 |
(100%) |