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Veterinary Pathology, Vol 33, Issue 6 656-661, Copyright © 1996 by American College of Veterinary Pathologists

ARTICLES

The relationship between hepatic copper content and morphologic changes in the liver of West Highland White Terriers

L. P. Thornburg, G. Rottinghaus, G. Dennis and S. Crawford
Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri, Columbia, USA.

Liver tissue from 17 West Highland White Terriers (WHWTs) with cirrhosis, subacute bridging necrosis, hepatitis, or massive necrosis were examined for the presence, composition, and distribution of inflammatory foci. Copper analysis was performed on the specimens. The foci of inflammation and necrosis composed a significant part of the lesion in 15 of the samples. The foci were of two types. One, characteristic of idiopathic chronic active hepatitis, consisted of one or two apoptotic hepatocytes attended by lymphocytes and plasma cells. These foci were found primarily in the vicinity of the portal tracts, not associated with centrolobular copper-laden hepatocytes. The other type of focus was characteristic of copper toxicosis. These foci were larger and composed of debris-filled macrophages, lymphocytes, plasma cells, and scattered neutrophils, and on occasion apoptotic hepatocytes were found at the periphery. These foci were always found around the central vein among the copper-laden hepatocytes. Such foci were found only in dogs with copper concentration > 2,000 parts/million on a dry weight basis. These morphologic studies show that clinical liver disease in WHWTs is caused by more than one etiologic agent. Among 17 WHWTs with clinical liver disease, two had copper toxicosis, five had idiopathic chronic active hepatitis, and 10 had hepatic disease of undetermined type.


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