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Thymoma-associated exfoliative dermatitis in a goat: case report and brief literature review.

Authors
  • Byas, Alex D1, 2, 3
  • Applegate, Tanya J1, 2, 3
  • Stuart, Amy1, 2, 3
  • Byers, Stacey1, 2, 3
  • Frank, Chad B1, 2, 3
  • 1 Departments of Microbiology, Immunology, and Pathology (Byas, Frank), College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO.
  • 2 Clinical Sciences (Applegate, Stuart), College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO.
  • 3 Department of Large Animal Medicine and Surgery, School of Veterinary Medicine, St. George's University, True Blue, Grenada, West Indies, Grenada (Byers). , (Grenada)
Type
Published Article
Journal
Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc
Publication Date
Nov 01, 2019
Volume
31
Issue
6
Pages
905–908
Identifiers
DOI: 10.1177/1040638719884957
PMID: 31650897
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

A Rock Alpine doe (Capra aegagrus hircus) was presented to the Colorado State University Veterinary Teaching Hospital because of scaling and ulceration over the withers, coronary bands, and dewclaws. The doe was euthanized because of poor prognosis associated with a radiographically identified cranial mediastinal mass, increased respiratory effort, and discomfort. Autopsy revealed a cranial mediastinal mass, and scaling-to-ulcerative lesions affecting the dorsum, ventrum, pinna, neck, teats, coronary bands, and dewclaws. Histologically, the mediastinal mass was an epithelial neoplasm with admixed non-neoplastic T lymphocytes, consistent with a lymphoepithelial (mixed) thymoma. Sections of affected skin were characterized by hyperkeratotic cell-rich interface dermatitis with transepidermal and follicular apoptosis. Thymoma-associated exfoliative dermatitis has been recognized in cats and a rabbit, but has not been reported previously in a goat, to our knowledge. Given that thymomas are not uncommon in goats, thymoma-associated exfoliative dermatitis should be considered a clinical differential in goats with dermatologic disease.

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