[Divry-Van Bogaert cortico-meningeal angiomatosis and Sneddon's syndrome. Nosological study. Apropos of 4 cases].

Four patients with idiopathic livedo reticularis and multiple cerebral ischemic events leading to a severe dementia are reported. Imaging (CT, MRI, angiograms) and pathological features (in one case) are presented. Similar clinical features have been described previously in Divry-van Bogaert's disease and Sneddon's syndrome. Data from our cases and a review of the literature did not find distinctive characteristic between these entities. Thus, for practical purposes, considering them as one group appears at present warranted.