Genetic testing - CADASYL (Cerebral Autosomal-Dominant Arteriopathy With subcortical Infarcts and Leukoencephalopathy) (See arteriopathy with subcortical cerebral infarcts and leukoencephalopathy, autosomal dominant).

See:
 
Arteriopathy with subcortical cerebral infarcts and leukoencephalopathy, autosomal dominant (CADASYL) (Cerebral Autosomal-Dominant Arteriopathy With subcortical Infarcts and Leukoencephalopathy) - Gen NOTCH3