Cerebral amyloid angiopathy (CAA), also known as congophilic angiopathy, is a form of angiopathy in which amyloid deposits form in the walls of the blood vessels of the central nervous system. The term congophilic is used because the presence of the abnormal aggregations of amyloid can be demonstrated by microscopic examination of brain tissue after application of a special stain called Congo red. The amyloid material is only found in the brain and as such the disease is not related to other forms of amyloidosis. As such this disease is seen after the 7th decade and more than 50 % cases are seen after 90 years. But after the disease is diagnosed there is no as such predictable survival years for this particular disease. People live for even years after they are diagnosed. But definitely the quality of life is affected to a great extent.