<unk>  <unk> , or unilateral megalencephaly, is a rare congenital disorder affecting all or a part of a cerebral hemisphere. It causes severe seizures, which are often frequent and hard to control. A minority might have seizure control with medicines, but most will need removal or disconnection of the affected hemisphere as the best chance. Uncontrolled, they often cause progressive intellectual disability and brain damage and stop development.
Hemimegalencephaly
Schizencephaly
Holoprosencephaly
Microlissencephaly
Lissencephaly
Megalencephaly
Hydranencephaly
Hemihydranencephaly