Lyon wrote:I'm trying to understand what you mean.
Are you saying that the membrane showed up on some kind of imaging test when you were 3 months old or that you were born with an ailment in which doctors noticed your membrane at a young age?
We have noticed a tiny membranous anomaly at the wall of the healthy rIJV exactly at the same position where a huge membranous web was found at the lIJV. According to the radiologist, this is an anomaly that can only happen during development, similarly to moles on the skin.
It seems that this tiny malformation touched the opposite wall of the lIJV but not of the rIJV, when I was still an embryo, and grew forming a web. Of course these are speculations, but it is a very reasonable explanation. It is a very strong indication of anomalies in the IJVs.
A friend has had a hypoplastic underdeveloped lIJV with abnormal diameter (less than 1 cm when supine) which simply can't but have happened during development, too, long before MS emerges.
Again, I don't know if CCSVI causes MS, but badly developed IJVs, hypoplastic and aplastic IJVs and membranous webs inside IJVs cause CCSVI. For now, it seems that, in most cases, CCSVI coexists with MS.