Merde... I forgot to post the link of the conversation the MS board.
I'm sure there are more interesting conversations but this is the one I encountered:
http://www.thisisms.com/ftopic-6488-465-days0-orderasc-.html
MS used to have a much more stringent diagnostic criteria than it has since MRI technology was introduced. There was no atypical MS before that. And, as we all know, in the early days it was Malingerers Disease.
What we forget is that no-one knows what causes MS and no-one knows the mechanism of disease. All that is known is that there is a loss of myelin which usually (historically) reveals itself in a sometimes predictable way usually, but not always, affecting the eyes and trigeminal nerves early in the course of illness.
The Obands (?) in the cerebrospinal fluid are not always checked for since the advent of MRI and the discovery of predictable patterns of hyperintensities in the periventricular areas of white matter. EVPs are sometimes fine in people with atypical MS and Obands are absent.
MS is (I nearly wrote: poplular
) very common in Western Canada and less common in Quebec. So, Mark, geography definitely plays a part but it is also, as you observe, now 3x as common in women than in men.
I remain convinced that many with ME actually fall more clearly into the MS basket and it is a basket. People with MS forums talk about having their diagnosis "yanked" - they are diaguessed with MS and then undiaguessed. And, I see virtually no difference between atypical MS and ME. My neurological diagnosis has varied between "possible MS" and "probable MS" depending on who you ask. Were I to lose the use of something, I would drop into atypical MS.
Another interesting piece of this puzzle is that one hears more and more about people coming down with MS after a flu-like illness. And, couples, where one or both were previously healthy, both getting MS.
Again, Mark, this supports an environmental possibility... or a virus. But really cannot be completely explained by lack of sun at northern latitudes. There is more sun on the praries than in BC but the rates of MS are lower in BC than Manitoba where it is very high.
This CCVSI (is that right?) issue is very interesting because of the large number of people with ME who also have neck issues. I have a retrolithesis and some stenosis. I have had whiplash from a car accident. I had terrible neck pain for months on end in the first few years of illness.
But, while these things might predispose me to having a wonky vein in that area due to trauma or misalignment it is not necessary to have any findings on MRI re one's neck in order to have the vein problem which is seen on echo, not MRI.
How is MS really different from ME? Most people with ME don't have an LP; if they did, ow many would have Obands? If they had obands, would they disappear from the ME community because they would be identified as MS? Given that Neurologist "believe in" MS and not ME, would we ever know?
I think this overlap is of consequence and I think it is of consequence to both communities. I know we talk a lot about how people with Mild MS fare better and we feel people with MS are treated better (that isn't always so) and that they have treatment but the treatment doesn't always work, can be very toxic and some people's illness has a swift and catastrophic course.
So, maybe they have XMRV, maybe we have CCVSI, maybe we and they have both.
ETA Re the LP results. When I was spending time on MS forums, many there did not have a positive LP, or a constantly pos. result, although they have considerable disability. One patient, a very senior member who had severe disability, opined that if the LP was done when your disease was not active, your result would be negative. Many on the forum agreed with him.
And, yes, Mark, the MS community is very interested in several issues like fungus since they are in a very similar position to us and continue to struggle to find better answers and options in regards to diagnosis and treatment. What you wrote about the increase in MS which parallels the rise in cases of ME is pertinent, I think.