Hydrocephalus, communicating

Hydrocephalus, communicating: Hydrocephalus in which there is no obstruction to the flow of the cerebrospinal fluid (CSF). Specifically, there is no obstruction within the ventricular system of the brain or where the CSF passes into the spinal canal. By process of elimination, the hydrocephalus is due to overproduction of CSF or failure of the brain to reabsorb CSF normally.