May Be Caused by

 Common

Choroid plexus

Heterotopic gray matter

Neurocysticercosis

Tuberous sclerosis

 Uncommon

Choroid plexus carcinoma

Choroid plexus papilloma

Ependymal adhesion

Ependymitis

Ependymoma

Epidermoid

Meningioma

Subependymoma