Peer-reviewed veterinary case report
Calcifying aponeurotic fibroma tumor on a dog's paw
By Yang, Yeseul et al.·Published in The Canadian veterinary journal = La revue veterinaire canadienne·2022·Department of Veterinary Pathology (Go, South Korea·View original on PubMed →
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Original publication title: Calcifying aponeurotic fibroma on the paw in a dog.
- Species:
- dog
Plain-English summary
A 12-year-old spayed female Maltese was brought to the vet with a firm, round mass on the top of her left back paw, as well as another mass in her neck. The paw mass was found to be a rare type of tumor called calcifying aponeurotic fibroma, while the neck mass was diagnosed as thyroid follicular carcinoma, a type of cancer. Fortunately, there were no signs of recurrence or spread of the tumors during follow-up. The dog received appropriate treatment, and the outcome was positive with no further complications reported.
People also search for: dog paw lump · Maltese tumor treatment · thyroid cancer in dogs
Abstract
A 12-year-old, spayed female, Maltese dog with a round and firm mass on the dorsal part of the left rear paw and a cervical mass was brought to the clinic. The paw mass was contiguous to the adjacent tendon; it was composed of neoplastic mesenchymal cells and had scattered foci of calcification with chondroid differentiation microscopically. The neoplastic cells were positive for vimentin and S100, but negative for desmin and smooth muscle actin. Microscopic features and immunohistochemistry results were consistent with calcifying aponeurotic fibroma (CAF). The cervical mass was composed of polygonal cells forming acini with marked anisocytosis and anisokaryosis and diagnosed as thyroid follicular carcinoma. No recurrence or metastasis occurred during follow-up. To the best of our knowledge, this is the first case of canine CAF with features identical to its human counterparts. Key clinical message: This report describes the rare case of calcifying aponeurotic fibroma on the paw in a dog. This is apparently the first case in the veterinary literature with identical clinical and pathological features to the human counterpart.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/35110769/