Communicating hydrocephalus

What it means

A form of hydrocephalus in which there is no visible obstruction to the flow of the cerebrospinal fluid between the ventricles and subarachnoid space.

Communicating hydrocephalus may be caused by overproduction of CSF, defective absorption of CSF (the most common cause) or venous drainage insufficiency.

Rare diseases that can present with this15

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category