New York University School of Medicine, Division of Neurogenetics is conducting a new research study for patients with CADASIL (cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy). We are inviting anyone age 18 or older with a confirmed diagnosis of CADASIL to participate. We greatly appreciate your help in this regard. Please be assured that if you participate, all the information you, your relatives or your physicians provide will be held in strict confidence.