Subpopulation of dogs with severe brain parenchymal beta amyloidosis distinguished with cluster analysis.

A study of the brains of 30 dogs, mongrels from 6.5 to 26.5 years of age, revealed that all dogs older than 13 years of age develop amyloid-beta-positive plaques.

The origin of amyloid in cerebral vessels of aged dogs.

Our morphometric study of 30 dogs, mongrels, from 6.5 to 26.5 years of age, shows amyloid angiopathy in cortical and leptomeningeal vessels of all dogs older than 13.