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Veterinary Pathology, Vol 33, Issue 2 150-158, Copyright © 1996 by American College of Veterinary Pathologists

ARTICLES

Cystic urogenital anomalies in ferrets (Mustela putorius furo)

X. Li, J. G. Fox, S. E. Erdman, N. S. Lipman and J. C. Murphy
Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, USA.

Single or multiple semispherical to bilobulated fluid-filled cystic structures of variable size were observed on the dorsal aspects of the urinary bladder of four male and two female ferrets (Mustela putorius furo). All ferrets had been neutered. On physical examination, the cysts were palpated as caudal abdominal masses. Three of the six ferrets presented with dysuria, and two ferrets had signs compatible with endocrine dysfunction. Adrenal cortical hyperplasia or neoplasia were observed in all of the five ferrets examined. Sex hormones assayed in one of the six ferrets revealed elevated levels of serum estrodiol. The posterior aspect of the cysts was located on and/or attached to the trigone or neck of the bladder, with variable intraluminal communication with the bladder and/or the urethra. The anterior aspect of the cysts projected dorsally or dorsocranially into the caudal abdomen. The cysts were thin walled and contained urinelike fluid (n = 5) or viscous yellow fluid (n = 1). Histologically, the cyst walls were composed of three layers, epithelium, muscle, and serosa, with fibrovascular stroma between layers. The epithelium consisted of simple to stratified transitional, columnar, or squamous epithelial cells. The muscular layer consisted of intermittent bundles and/or single to double layers of continuous to discontinuous smooth muscle. The serosal layer consisted of loose fibrous stroma covered by flattened mesothelial cells. The cystic anomalies in these ferrets were most likely derived from the urogenital glands/ducts or other remnants.


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M. Ammersbach, J. DeLay, J. L. Caswell, D. A. Smith, W. M. Taylor, and D. Bienzle
Laboratory Findings, Histopathology, and Immunophenotype of Lymphoma in Domestic Ferrets
Vet. Pathol., September 1, 2008; 45(5): 663 - 673.
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