Normal Pressure Hydrocephalus

Key points

• Normal pressure hydrocephalus Normal pressure hydrocephalus is a reversible cause of dementia seen in elderly patients. It is thought to be secondary to reduced CSF absorption at the arachnoid villi.
• urinary incontinence
• dementia and bradyphrenia
• gait abnormality (may be similar to Parkinson's disease) It is thought around 60% of patients will have all 3 features at the time of diagnosis. Symptoms typically develop over a few months. Imaging
• hydrocephalus with an enlarged fourth ventricle