hydrocephalus
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“Hdrocephalus” a greek word made up of two words ‘‘hydro’’(water), and ‘‘cephalus’’ ( head), is a condition characterised by an abnormal build up of cerebro spinal fluid (CSF) in the brain ventricles (1).

  • accumilation of CSF is thought to be due to an imbalance between production and absorption of CSF with subsequent enlargement of brain ventricles 

Recently proposed definitions of hydrocephalus is:

‘‘Hydrocephalus is an active distension of the ventricular system of the brain resulting from the inadequate passage of cerebrospinal fluid from its point of production within the cerebral ventricles to its point of absorption into the systemic circulation.’’

Another condition, hydrocephalus ex vacuo, manifests as enlarged ventricles because of destruction of cerebral tissue and the consequent expansion of the ventricles.

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