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Literally means "water on the brain"; increase in the size of ventricles and amount of cerebrospinal fluid (CSF) in the brainThere are numerous causes, including congenital birth defect, brain tumor, and brain injury.

  • Communicating hydrocephalus is caused by a lack of CSF absorption.
  • Non-communicating hydrocephalus is caused by a blockage of CSF flow.
  • Hydrocephalus ex vacuo is caused by an apparent increase in ventricular size due to loss of ancilliary brain tissue.

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Related Words

 brain ; cerebrospinal fluid (CSF) ; congenital ; tumor ; ventricles