But healthy people don't take part as controls in MS clinical trials, MSer's receiving a placebo do.
But healthy volunteers have had MRI scans done so they can research what they find and that's when they have seen lesions.
Yes, there are other causes of demyelination besides MS, but no, lesions are not found in healthy people. There is always a pathology associated with them. Just because a specific lesion doesn't correlate to a specific symptom doesn't mean that lesioning isn't associated with neurological symptoms - it is.
I believe you are wrong on that point. Lesions are seen on MRI scans in healthy people. A number of years ago I read information on that and was also told the same info by a person who does MS research. And they also discovered that lesions do come and go on their own and they are not sure just why.
Unlike MS, there is no defined symptomology that has been associated with
CCSVI. This is supported by the findings that: a high percentage of PwMS do not have CCSVI on doppler, a fair # of healthy people without illness may have CCSVI, and many PwMS do not report any change in their health following treatment and alleviation of CCSVI.
Other than many MS patients who have CCSVI have several levels of symptoms!
There are MS patients who don't have visible lesions but have symptoms. (My wife was one of them) Of course there are people who have CCSVI and are healthy. There are people who have lesions and appear healthy even though they have been diagnosed with MS. And there are MS patients who do not have any change in their health after they receive one of the approved drugs.
It's impossible to try and state what does or doesn't affect MS. Without a known cause it's all theory and speculation. What some researchers say may be the answer other researchers say is all wrong and vice versa.
It is enough to make one wonder whether CCSVI is disease-causing at all or simply a benign anomaly/variation.
But what can be said is that until a lot more research is done with CCSVI, one can't make any kind of definitive statement one way or the other.