Washington DC
In my last
post I wrote about the possibilities for error that lie in the fuzzy
borders around each of the current diagnostic criteria for Alzheimer’s. I’d like to tie together some loose ends from
that post.
New Diagnostic Criteria Involving PET Scans and Other
“Biomarkers”
The diagnostic criteria for Alzheimer’s are becoming
more precise and reliable as new laboratory and x-ray tests for physical
evidence (called “biomarkers”) become available. The current definitions (that I examined in
the last
post) use only the outward symptoms of the disease. Once biomarkers are added to the diagnostic
criteria, the diagnosis becomes more reliable. The PET brain scans
now being evaluated, for instance, can see the amyloid protein deposits in
the brain that are directly associated with Alzheimer’s. Analysis of cerebrospinal fluid can detect the
tau
protein that is similarly associated with Alzheimer’s. Much research is still being conducted to
determine exactly how to incorporate
these biomarkers into the diagnosis.
Some things are already very useful. If the PET scan for amyloid is negative, for
instance, you almost certainly don’t have Alzheimer’s. (If there is amyloid, it’s not so clear since
about 20% of those people apparently do not have Alzheimer’s.) But the several biomarkers that will soon be
available in clinical practice will make the diagnosis of Alzheimer’s much more
reliable.
The Trouble with Anecdotes
My experience of the past sixteen months is a good
example of the problems with anecdotal evidence, that is, individual stories that
cannot be statistically evaluated. Over
the past year, friends and readers have recommended dozens of different
treatments (sometimes even suggesting that doctors or drug companies are hiding
them from us). These sincere recommendations
have usually been based on stories of individual patients who took the
treatments and got better. I responded
to the comments (here
and here)
that I probably wouldn’t even look into the suggested treatment because,
basically, I trusted medical science to look into any reasonable possibility
for cure. If medical science wasn’t looking
into it, I wasn’t going to bother, either.
I keep myself healthy with diet and exercise, but I haven’t taken any
special treatments.
What might have happened if I had taken, say, coconut
oil, as a treatment? How many would
interpret my “cure” as “proof” that coconut oil worked. In reality, it would have been just a coincidence. The purpose of rigorous scientific testing is
to make sure that coincidences, improvements based on the placebo effect, original
misdiagnoses (as in my case) or other issues are not involved.
Isn’t it possible, some of my friends ask, that a new
untested treatment works and will later be scientifically justified. Of course.
I criticize no one who wants to try one of the many suggested treatments. But I wasn’t personally willing to spend my
emotional energy going back and forth trying one or another on the basis of the
latest anecdotes. I know some readers
will jump on me for this, but, before you comment, please at least go back and
read the two posts (here
and here)
that I wrote on the subject.
It’s a Miracle Anyway
In spite of all I’ve written above, I still experience
this “cure” as a miracle. It’s not that
the natural laws of the universe have been overruled or suspended or that
something scientifically impossible has actually happened. Finding myself free of Alzheimer’s is a
miracle because it’s something completely unexpected, something that I would
have considered impossible a year ago, something that gives me hope, something
that returns my life when it seemed to be disappearing. Sure, I can go back and explain each step scientifically,
as I have over the last several posts.
What has happened broke no laws of science … but it’s nevertheless a
miracle.
A New Title for My Blog
Given that I don’t have Alzheimer’s and that my
cognitive impairment is not progressing, the title of this blog, “Watching the
Lights Go Out,” seems to me a bit inappropriate, so I’m inviting suggestions
for a new title (or, perhaps, reasons to keep this title). My son-in-law suggests “Stop Playing with the
Dimmer.” What are your suggestions?