It’s currently impossible to definitively diagnosis Alzheimer’s disease while the patient is alive. Researchers recently analyzed around 800 brains from Alzheimer’s patients after they died, and learned that only about half of them actually had the disease. The other half suffered from other forms of dementia. A reliable way to diagnose the specific type of dementia from which patients are suffering is critical to guiding treatment for patients and for researching the disease processes.
http://pagingdrgupta.blogs.cnn.com/2011/02/23/half-of-alzheimers-cases-misdiagnosed/?hpt=T2
It's Interesting 