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Vet Pathol 40:334-337 (2003)
© 2003 American College of Veterinary Pathologists
BRIEF COMMUNICATIONS AND CASE REPORTS

Hemochromatosis Secondary to Repeated Blood Transfusions in a Dog

W. S. Sprague, T. B. Hackett, J. S. Johnson and C. J. Swardson-Olver

Abstract

Hemochromatosis was presumptively diagnosed using cytologic examination of liver tissue from an aged male Miniature Schnauzer. The dog was presented after receiving whole blood transfusion every 6–8 weeks for 3 years to treat pure red cell aplasia. The cytologic specimen contained clusters of hepatocytes with abundant intracytoplasmic gold-yellow pigment granules and clumps of extracellular, green-black, globular pigment, both interpreted to be hemosiderin. Histologic sections of liver revealed hepatocellular degeneration with bridging portal fibrosis, lobular atrophy, biliary hyperplasia, and diffuse, severe hemosiderin accumulation. Serum iron and ferritin levels, and dry-weight iron concentrations of liver, heart, and kidneys were markedly increased. Hemosiderin accumulation was confirmed in hepatocytes of cytologic and histologic specimens using Perl's Prussian blue staining. This report is the first description of transfusional hemochromatosis in a dog and is the first to describe its cytologic appearance in a veterinary patient.

Key words: Cytology; dogs; hemochromatosis; iron overload; liver.

Request reprints from Dr. W. S. Sprague, Department of Microbiology, Immunology and Pathology, Colorado State University, 1619 Campus Delivery, Fort Collins, CO 80523-1619 (USA). E-mail: wsprague{at}lamar.colostate.edu.






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