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Stroke, Vol 21, 480-483, Copyright © 1990 by American Heart Association

ARTICLES

Cerebral amyloid angiopathy as a cause of subarachnoid hemorrhage

T Ohshima, T Endo, H Nukui, S Ikeda, D Allsop and T Onaya
Third Department of Internal Medicine, University of Yamanashi Medical School, Tamaho, Japan.

Cerebral amyloid angiopathy is a pathologic condition characterized by the deposition of amyloid in the walls of small vessels in the cerebral cortex and meninges. Intracerebral hemorrhage is common in persons with this condition, but pure subarachnoid or subdural hemorrhage is rarely seen. Recently, the existence of two types of amyloid proteins related to cerebral amyloid angiopathy, beta protein and cystatin C, has been reported, and immunohistochemical methods using antisera to these proteins have become available. We describe a patient with fatal subarachnoid hemorrhage presumably caused by beta protein-type cerebral amyloid angiopathy, which was demonstrated immunohistochemically by using a monoclonal antibody to a synthetic peptide corresponding to residues 8-17 of beta protein. We suggest that beta protein-type cerebral amyloid angiopathy is a possible etiologic factor in subarachnoid hemorrhage of unknown cause.

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