It's usually relatively easy for a medic to determine that someone probably has dementia. But it's sometimes not so easy to get a firm diagnosis of the actual disease the person has. It's said that the only way of getting a really accurate diagnosis is by examining the brain post mortem.
It took a long-established memory clinic 12 years to reach a diagnosis in my wife's case. And a visiting consultant said she had...........Alzheimer's. Other specialists since have had other ideas. And a while after the diagnosis we were told she also had Parkinson's. I can't help wondering, at times, how important this 'name game' is. What matters, to the PWD and their loved ones, is whether there are meds that will lessen the symptoms.
And then there's this to consider:
Perhaps the single most important conclusion from the 'nun study' is that Alzheimer disease is not straightforward. In several cases, pathology studies of brain tissue from the deceased nuns did not correlate with their performance on cognitive function tests. Sometimes the pathologist would score a brain as having signs of extremely advanced AD, only to learn later that the nun herself scored extremely well on all cognitive tests. Other times a brain would show only slight damage associated with AD, and the nun was characterized as exhibiting the signs of advanced cognitive decline and dementia.
(Alzheimer Disease and the “Nun Study”
May 4, 2009 by Michele Arduengo)