Cholangiocarcinoma and Squamous Cell Carcinoma of the Stratified Epithelial Portion of the Stomach in a Horse: A Case Report |
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Authors: | Dietrich Pizzigatti Fernando Arévalo Batista Charles Ferreira Martins Olímpio Crisóstomo Ribeiro Marcelo Monteiro Nunes Thiago Rinaldi Müller |
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Institution: | a Department of Veterinary Surgery and Anesthesiology, School of Veterinary Medicine and Animal Science-FMVZ, São Paulo State University-UNESP, São Paulo, Brazil b Department of Surgery, UFLA, Minas Gerais, Brazil c Department of Veterinary Clinic, School of Veterinary, UFPel, Rio Grande do Sul, Brazil d Department of Veterinary Clinical Pathology, UNIDERP, Campus III, Mato Grosso do Sul, Brazil e Department of Veterinary Image Diagnostic, FMVZ/UNESP, São Paulo, Brazil |
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Abstract: | Both cholangiocarcinoma and squamous cell carcinoma of the stomach stratified squamous epithelial portion are rarely found in equine medicine despite being more common in human beings, dogs, and cats. The objective of the present article was to report the simultaneous occurrences of these two types of neoplasias in an 11-year-old mare. Numerous firm, whitish nodules were distributed throughout the liver parenchyma and those protruding over its surface were umbilicated in their appearance. It was verified that the nodules adhered to the peritoneum and omentum, diaphragm, spleen, and stomach serosa compressed the adjacent structures. The stomach stratified squamous epithelial portion, particularly originating in the margo plicatus toward the cardia, was covered by numerous smooth, whitish spherules. Microscopic examination allowed the liver, tumor, and the abdominal implants to be identified as a cholangiocarcinoma, and the stomach neoplasia as a carcinoma of its stratified squamous epithelial portion. Considering this as an uncommon finding, although when considered individually, the presence of a cholangiocarcinoma and a squamous cell carcinoma of the stratified squamous epithelial portion of the equine stomach in the same specimen is worthy of reporting. |
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Keywords: | Equine Liver Cholangiocarcinoma Stomach Squamous cell carcinoma |
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