Peer-reviewed veterinary case report
Mass on right hip of 6-year-old Flat-coated Retriever dog
By Forsyth, S F et al.·Published in New Zealand veterinary journal·2009·Institute of Veterinary·View original on PubMed →
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Original publication title: Possible parachordoma in a dog.
- Species:
- dog
Plain-English summary
A 6-and-a-half-year-old female Flat-coated Retriever had a 15-mm mass on her right hip that was found to be a possible parachordoma, a type of benign tumor. The mass was examined through a needle aspiration and showed abnormal cells, but it was surgically removed without any signs of recurrence or spread after 18 months. This case is notable as it's the first reported instance of this type of tumor in dogs, which can appear similar to malignant tumors but is actually benign.
People also search for: dog hip mass · Flat-coated Retriever tumor · parachordoma in dogs · dog tumor surgery recovery
Abstract
CASE HISTORY: A 15-mm diameter mass developed in the S/C tissue overlying the right lateral gluteal muscle of a 6(1/2)-year-old female Flat-coated Retriever. PATHOLOGICAL FINDINGS: Cytological preparations following aspiration of the mass were highly cellular and consisted of a population of large polygonal cells containing single to multiple nuclei, large prominent nucleoli, and intracytoplasmic vacuoles. Histologically, the neoplasm consisted of similar large cells surrounded by thick fibrous connective tissue trabeculae. The large polygonal cells reacted positively with antibodies against vimentin, low- and high-molecular-weight variants of cytokeratin (AE1/AE3), but not with antibodies to desmin or glial fibrillary acidic protein (GFAP). DIAGNOSIS: The clinical, gross, histological and immunohistochemical findings are similar to those reported for parachordomas in humans. Neither recurrence nor metastases were noted 18 months after surgical excision of the mass. CLINICAL RELEVANCE: This is the first reported case of a possible parachordoma in a dog, a benign tumour with cytological features of malignancy.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/19802045/