June 20, 2011 — Evaluating patients with multiple sclerosis who have narrowed jugular and azygos veins — and the value of widening those veins with angioplasty — warrants careful, well-designed research, noted members of a Society of Interventional Radiology Foundation's research consensus panel. The multidisciplinary panel indicated that while specific parameters for a large-scale, pivotal multicenter trial are not now available, that type of study is the "mandatory goal" in exploring a condition called chronic cerebrospinal venous insufficiency (or CCSVI).