The presence of abnormalities in the cerebral venous circulation, defined as Chronic Cerebrospinal Venous Insufficiency (CCSVI), has recently been reported in patients with Multiple Sclerosis (MS), in healthy subjects and in subjects with other neurological diseases. These reports have aroused much interest both in the scientific world and, above all, among the communities of patients and Associations having the aim of aiding people with MS and of promoting scientific research into this disease.