Peer-reviewed veterinary case report
Dark pigmented skin tumor on face of 7-year-old mixed breed dog
By Park, Sang-Ik & Cho, Kyoung-Oh·Published in The Japanese journal of veterinary research·2010·College of Veterinary Medicine, South Korea·View original on PubMed →
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Original publication title: Dermal melanocytoma-acanthoma in an adult mixed breed dog.
- Species:
- dog
Plain-English summary
A 7-year-old female mixed breed dog had a dark, raised nodule on her face that was diagnosed as a type of skin tumor called a melanocytoma-acanthoma. This tumor is made up of pigmented cells and small cysts, but it was not cancerous. The dog did not show any signs of atypical cells, which is a good sign. While the report adds to the understanding of this rare tumor, the dog’s treatment and recovery details were not specified.
People also search for: dog skin tumor treatment · mixed breed dog face lump · what is a melanocytoma in dogs
Abstract
A cutaneous melanocytoma-acanthoma was diagnosed in a 7-year-old intact female mixed breed dog. Grossly, this tumor was a solitary and darkly pigmented nodule located in the face. Histologically, the lesions consisted of melanocytic and epithelial tumor cells. The melanocytic component consisted predominantly of large round-to-polygonal and heavily pigmented melanocytic cells arranged in nests and clusters. These melanocytes were positive for S-100 and vimentin. The epithelial component was composed of multiple small horn cysts with concentric keratin within the cyst lumina and was positive for cytokeratin. Atypism was not observed in both components. Since this tumor has previously been reported in only two dogs, this report adds to the data that will help determing predilections of age, breed, sex and site.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/21180256/