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Veterinary Pathology, Vol 33, Issue 4 451-453, Copyright © 1996 by American College of Veterinary Pathologists

ARTICLES

Diabetes mellitus in a dog with a growth hormone-producing acidophilic adenoma of the adenohypophysis

L. J. van Keulen, J. L. Wesdorp and H. S. Kooistra
Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, The Netherlands.

A 9-year-old male Doberman Pinscher was referred to the Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, for polyuria/polydipsia, anorexia, and vomiting. Laboratory examination of blood and urine revealed hyperglycemia, glucosuria, and acidosis. Diabetes mellitus was diagnosed but was very resistant to subsequent insulin treatment. At the owners' request, the dog was euthanatized and a postmortem examination was performed. In addition to hepatic, pancreatic, and renal changes compatible with diabetes mellitus, an acidophilic adenoma of the adenohypophysis was found. Immunohistochemical staining for growth hormone, adrenocorticotropic hormone, and prolactin showed a strong immunolabeling for growth hormone within the cytoplasm of the tumor cells. Although growth hormone level was not measured in the plasma, our findings suggest that the diabetes mellitus in this dog was caused by excess growth hormone secreted by the pituitary neoplasm.




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Copyright © 1996 by the American College of Veterinary Pathologists.