[Cerebral amyloid angiopathy].

Cerebral amyloid angiopathy is characterised by the presence of protein deposits in the wall of the cerebral vessels. Sporadic forms with deposits of Abeta peptide are the most frequent. The diagnosis of cerebral amyloid angiopathy is only certain when amyloid deposits can be visualized on cerebral tissue by biopsy, that appears in most circumstances to carry too many risks for the expected benefits, or post mortem.