Normal-pressure hydrocephalus: twelve years experience.

The authors report on twelve years experience with so-called normal pressure hydrocephalus. If care is taken to make a correct diagnosis and give adequate treatment with a shunt, hydrocephalic dementia has a good prognosis. Such cases should be distinguished from other syndromes, particularly senile dementia and Alzheimer's disease. The occurrence of a syndrome of dementia should compel every neurologist and neurosurgeon to carry out careful investigations in order to determine the favourable time for possible treatment.