A new study provides more evidence that multiple sclerosis (MS) is not caused by a blood vessel condition, as some research has suggested. The new findings follow a study last month in which Dr. Ellen Marder from the Dallas Veterans Affairs Medical Center and her colleagues reviewed the current literature on the condition, called chronic cerebrospinal venous insufficiency, or CCSVI. They couldn’t find any convincing data to suggest that narrowing blood vessels in CCSVI are behind MS.
