(A-B) (C-D) (E-H) (I-M) (N-R) (S-Z)

Noncommunicating Hydrocephalus: hydrocephalus in which the ere is obstruction of f the flow of CSF through the cerebral aqueduct or from the fourth ventricle to the subarachnoid space

Normal Pressure Hydrocephalus: a syndrome characterized by enlarged ventricles and a triad of symptoms including gait disturbance, dementia and impaired bladder control; a form of hydrocephalus that occurs most often in middle aged and older persons.

Obstructive Hydrocephalus: hydrocephalus caused by a blockage along the CSF flow pathway.