hydrocephalus /hy·dro·ceph·a·lus/ (-sef´ah-lus) a congenital or acquired condition marked by dilatation of the cerebral ventricles, usually occurring secondarily to obstruction of the cerebrospinal fluid pathways, and accompanied by an accumulation of cerebrospinal fluid within the skull; typically, there is enlargement of the head, prominence of the forehead, brain atrophy, mental deterioration, and convulsions.hydrocephal´ic
communicating hydrocephalus that in which there is free access of fluid between the ventricles of the brain and the spinal canal.
noncommunicating hydrocephalus obstructive h.
normal-pressure hydrocephalus , normal-pressure occult hydrocephalus dementia, ataxia, and urinary incontinence with enlarged ventricles associated with inadequacy of the subarachnoid spaces, but with normal cerebrospinal fluid pressure.
obstructive hydrocephalus that due to obstruction of the flow of cerebrospinal fluid within the brain ventricles or through their exit foramina.
otitic hydrocephalus that caused by spread of inflammation of otitis media to the cranial cavity.
posthemorrhagic hydrocephalus hydrocephalus in an infant following intracranial hemorrhage that has distended the ventricles and obstructed normal pathways for cerebrospinal fluid.
hydrocephalus ex va´cuo compensatory replacement by cerebrospinal fluid of the volume of tissue lost in atrophy of the brain.
hydrocephalus ex vac·u·o ( ks v k y - )n. A hydrocephalic condition resulting from the loss or atrophy of brain tissue. |
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