Washington DC
Since my thorough neuropsychological evaluation for
cognitive impairment in late August, I’ve been nervously awaiting the results,
which had been delayed in part by the government shutdown, including the
National Institutes of Health (NIH).
Last Tuesday, I finally got them: the tests were completely normal; there’s
no sign of cognitive impairment.
This is, of course, wonderful news and should be a
great relief. I tend, however, to be a glass-half-empty
kind of guy, and I don’ feel much relieved: I’ve traded a diagnosis (Alzheimer’s
disease) for a set of disturbing symptoms with no reasonable explanation.
In case you’ve been reading these posts only
occasionally, let me summarize my situation. About three years ago I started having
symptoms of cognitive impairment (getting lost, inability to perform certain
bookkeeping responsibilities, increasingly poor memory, losing things
constantly, and so on). Two years ago I
visited a neurologist who administered the usual cognitive testing, which
revealed mild impairment. Repeat testing
a year later also show a mild degree of impairment. Other major causes of cognitive impairment
were ruled out, so I was left with a diagnosis of Mild Cognitive Impairment
(MCI), probably Alzheimer’s. This blog
has been a description of my ongoing experience with this impairment.
As part of research studies that I’ve participated in,
I have now had three
brain scans over the past eight months, none of which has shown any sign of
Alzheimer’s disease. This most recent
neuropsychological set of tests at NIH was very intensive and extensive, about
four hours in length. Unlike the
previous, less thorough tests of cognitive function, this more rigorous
evaluation shows no sign of cognitive impairment.
So I now have a set of symptoms that have impaired me
for several years but for which I can find no reasonable explanation. The reason I have avoided making entries in
this blog over the past week is that I haven’t known what to write; this has so
stunned me that I’ve had to talk it through with family and some friends. So far, I can’t explain it in any reasonable
way. Here are some of the thoughts I’ve
had.
- Perhaps my previously diagnosed cognitive impairment has resolved and I’ve gotten better.
Unlikely. My symptoms haven’t gone away. Also, any cause of cognitive impairment (of longer than six months) that might improve with time (vitamin B-12 deficiency, for instance) has been medically ruled out. These things just don’t get better.
- Perhaps all the brain scans and the neuropsychological tests have been wrong.
Unlikely. Any medical test, of course, can be normal even when the disease is present. In the case of the tests I’ve taken, this “false negative” rate is very roughly 10% for each. Mathematically, that means that there is more than a 99.99% chance that at least one of the tests would be positive if I had Alzheimer’s.
- Perhaps it’s some other form of cognitive impairment.
Unlikely: Not only have I been thoroughly evaluated to rule out the other reasonable causes, but the intense cognitive testing indicates no sign of impairment for any reason.
- Perhaps I’m imagining it.
Always a possibility, but people very close to me have also seen obvious evidence of impairment for several years and no one, including a trained psychologist who knows me well, finds this possibility credible. I don’t either.
There are a number of other possibilities I’ll explore
in later posts, but for now, any explanation I’ve been able to come up with is
highly improbable.
As I written before,
all of this can be extremely unsettling.
For several days last week, I felt quite unmoored. I’d come
to terms with my identity as an Alzheimer’s patient and now it had become,
at the very least, uncertain. This life over
the past year as an Alzheimer’s patient had become very meaningful and
fulfilling. What was I now? What was I going to do?
But after lots of conversation with friends and family, I
no longer feel so unmoored. This is but
one more twist in a bumpy, uncertain road.
I can trust myself and my perceptions.
I can simply wait for the next step in this strange journey. I feel ready to let go and see what exciting
thing will happen.
These test results, whatever they ultimately mean, are
good news. At the very least, the
impairment I perceive is progressing very slowly. At the very least, this is another
opportunity to learn to live with uncertainty, just as most people with mild
cognitive symptoms have to. It’s an
opportunity to let
go of self.
This wild ride continues.