HTRA1 and Leukoencephalopathy: A similar phenomenon may be observed in autosomal recessive mutations in the HTRA1 gene, which causes Cerebral Autosomal Recessive Arteriopathy with Subcortical Infarcts and Leukoencephalopathy (Cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy - CARASIL).