Benign cerebral aqueductal stenosis in an adult.

We present a patient with partial stenosis of aqueduct of Sylvius which was an incidental finding without any clinical symptoms. That in our opinion means that the ventricular brain system has many reserves that are being activated before symptoms appear.

What is the appropriate shunt system for normal pressure hydrocephalus?

Normal pressure hydrocephalus (NPH) represents a common disorder among older people with mild elevation of cerebrospinal fluid pressure and certain clinical manifestations. We present a patient with such a disorder in whom a programmable valve was implanted. With the use of a lower opening pressure, the patient developed a subdural hematoma although the symptoms subsided.