May Be Caused by

 Common

Craniopharyngioma

Giant cell astrocytoma

Hypothalamic glioma

Optic chiasm glioma

Pineal germinoma

Pineal teratoma

Pinealoma

Pineoblastoma

Pituitary adenoma

 Uncommon

Arachnoid cyst

Basilar artery aneurysm

Basilar artery ectasia

Cavum septi pellucidi

Cavum velum interpositum

Cavum vergae

Choroid plexus carcinoma

Choroid plexus papilloma

Colloid cyst of third ventricle

Cysticercosis

Hydatid disease

Lipoma of corpus callosum

Meningioma

Paragonimiasis

Pineal cyst

Vein of Galen aneurysm