Hydrocephalus

Question 1

Causes of communicating hydrocephalus

Answer 1

A) Obstruction to CSF absorption: SAH, meningitis, carcinomatosis
B) Without obstruction to CSF absorption: NPH, choroid plexus papillomas

Question 2

Causes of non-communicating hydrocephalus based on level of obstruction

Answer 2

Foramen of Munro - colloid cyst, DNET
Cerebral aqueduct - aqueduct stenosis, web, tectal glioma
Foramen of Lushcka and Magendie - posterior fossa tumor (adults - meningioma, mets; pediatrics - ependymoma, pilocytic astrocytoma, medulloblastoma)