Abstract
Three autopsied cases of congophilic angiopathy have been studied by means of polarized light microscopy and in 2 of these, biopsy material is available for electron microscopic study. All 3 patients had a surgical procedure and a subsequent massive hemorrhagic episode. Two of these patients had clinical evidence of dementing syndrome, for which shunts were performed. Ultrastructural studies have confirmed the amyloid nature of the congophilic material in the 2 biopsied cases. The deposition of amyloid in these cases is believed to be a primary event and is related to a generalized body disorder. The distinction of congophilic angiopathy from Alzheimer's disease is discussed.
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