Normal Pressure Hydrocephalus (NPH) may or may not have an identifiable cause.


Conditions that can cause NPH (secondary):

(1) head trauma

(2) intracranial surgery

(3) meningitis

(4) subarachnoid hemorrhage


If no condition is identified, then it is termed primary NPH.



(1) A shunt operation is more likely to be successful in relieving symptoms for a patient with secondary NPH.

(2) The diagnosis of NPH may be made quickly with secondary NPH since it is easier to recognize the cause.


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