<unk>  (retinocochleocerebral vasculopathy) is a very rare form of microangiopathy characterized by encephalopathy, branch retinal artery occlusions and hearing loss. The cause is unknown but the current thinking is that antibodies are produced against endothelial cells in tiny arteries which leads to damage and the symptoms related to the illness. Despite this being an extremely rare disease, there are 4 registries collecting data on the illness; two are the United States, one in Germany, and one in Portugal.
Susac's syndrome
Banti's syndrome
Frey's syndrome
Renpenning's syndrome
Bálint's syndrome
Wartenberg's syndrome
Villaret's syndrome
Wilkinson's syndrome