Peer-reviewed veterinary case report
Horse has a firm brown-black skin nodule - what is it?
By Abid, H N et al.·Published in Journal of the American Veterinary Medical Association·1987·Murray State University·View original on PubMed →
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Original publication title: Chromomycosis in a horse.
- Species:
- horse
Plain-English summary
A 6-year-old Quarter Horse gelding had a firm, round, brown-black lump on its right hip that was examined by a veterinarian. The lump was surgically removed, and thankfully, it did not come back. Tests on the removed tissue showed signs of a rare skin infection caused by certain types of fungi. This condition, called chromomycosis, is not common in horses and can sometimes be confused with other skin issues like tumors or infections. In this case, the treatment was successful, and the horse did not have any further problems after the surgery.
Abstract
A 6-year-old Quarter Horse gelding was examined because it had a sharply circumscribed, firm, brown-black, roughly spherical dermal nodule at the right tuber ischii. After it was excised, the lesion did not recur. Microscopically, the dermis of the excised specimen had multiple pyogranulomas, many of which contained thick-walled, dark brown fungal elements, some with internal septation compatible with chromomycotic fungi. Chromomycosis is a rare skin disease in the horse. It may be included in the differential diagnoses of nodular and/or pigmented skin lesions that include melanoma, pyogranuloma, mycetoma, squamous cell carcinoma, habronemiasis, and onchocerciasis.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/3679962/