Peer-reviewed veterinary case report
Dog with bone-forming fibroma blocking ear canal treated by surgery
By Park, Jin-Kyu et al.·Published in Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·2010·College of Veterinary Medicine, South Korea·View original on PubMed →
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Original publication title: Fibroma with osseous metaplasia of external auditory canal in a dog.
- Species:
- dog
Plain-English summary
A 7-year-old male Pomeranian was brought in because he had a mass blocking his right ear canal, which was making it difficult for him to hear. The veterinarian found a well-defined growth near the eardrum and surgically removed it. The mass was firm and contained both soft tissue and bony components. After the surgery, the dog was diagnosed with a fibroma (a type of benign tumor) that had developed some bone-like tissue. The dog recovered well after the procedure and should have improved hearing without the obstruction.
People also search for: dog ear canal mass · Pomeranian ear problems · ear tumor surgery in dogs
Abstract
The present report describes a case of fibroma with osseous metaplasia of the external auditory canal in a 7-year-old male Pomeranian dog. Upon otoscopic examination, the right external auditory canal was almost completely obstructed by a well-circumscribed mass adjacent to the eardrum. The mass was surgically excised. Grossly, it was well demarcated, firm when cut, pink, and measured 0.3 cm x 0.2 cm x 0.7 cm. The cut surface of the mass exhibited a central portion of homogeneously white osseous components surrounded by brown to pink soft tissue. Microscopically, the resected external auditory canal mass mainly consisted of fibroblastic spindle cells showing differentiation to metaplastic osteoblast-like cells. Metaplastic osteoblasts and osteoclasts lining the osteoid bony trabeculae were also observed. Bony trabeculae and spicules were separated by abundant collagen and neoplastic fibroblastic cells. Fibromatous components, irregular formation of woven bone spicules, and the presence of osteoblasts lining bony trabeculae led to a diagnosis of fibroma with osseous metaplasia.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/20622240/