Obstructive Hydrocephalus

Obstructive hydrocephalus is the most common type. Obstruction to CSF circulation may occur within the ventricles or within the subarachnoid space. If the obstruction is within the ventricles, the hydrocephalus is noncommunicating; that is, the ventricles do not communicate with the subarachnoid space. If the obstruction is within the subarachnoid space, the hydrocephalus is communicating.

Common causes of obstructive hydrocephalus are congenital malformations and acquired pathologic lesions.

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