Studies in 2011 Could Decide MS Theory's Validity

Preliminary studies have suggested that a phenomenon called Chronic Cerebrospinal Venous Insufficiency (CCSVI), a reported abnormality in blood drainage from the brain and spinal cord, may contribute to nervous system damage in MS. ...................

http://www.nationalmssociety.org/research/intriguing-leads-on-the-horizon/ccsvi/index.aspx