Welcome to the forum!
Normally there is a connection between lesions and veins, e.g. Dawson's fingers in the brain are typical for a problem with the jugulars. Lower lesions in the spine should have to do something with the azygos whereas higher spine lesions e.g. at the level of atlas or axis could have their origin in a problem concerning the jugulars. But that's just a rough distinction and I'm no expert. But I also digged for the problem as I have lesions in the spine, too.
Unfortunately there aren't many special reports about the lesions in the spine and CCSVI. The best overview is imho this by Dr. Schelling: http://www.ms-info.net/evo/msmanu/839.htm
You might also find the images of this presentation helpful, especially about the azygos:
(only a part is in spanish, I downloaded the file as I didn't make it to view the whole presentation online).
Hope this helps!