May Be Caused by

 Common

Cerebral atrophy

Hydrocephalus

Intracranial hemorrhage

 Uncommon

Absent septum pellucidum

Agenesis of the corpus callosum

Anencephaly

Chiari II malformation

Corpus callosum lipoma

Dandy-Walker syndrome

Dandy-Walker variant

Encephalitis

Hemimegancephaly

Holoprosencephaly

Hydranencephaly

Hypoxic ischemic injury

Intracranial calcification

Lissencephaly

Meningitis

Mineralizing vasculopathy

Neoplasm

Porencephalic cyst

Schizencephaly

Vein of Galen aneurysm

Ventriculitis