It should be suspected in infants or children with intractable, frequent seizures. On a CT scan, the affected part is distorted and enlarged. It can be diagnosed prenatally, but a lot of cases go undiagnosed until seizures begin. Ultrasound can display asymmetrical brain hemispheres.
Hemimegalencephaly
Schizencephaly
Holoprosencephaly
Microlissencephaly
Lissencephaly
Megalencephaly
Hydranencephaly
Hemihydranencephaly