Peer-reviewed veterinary case report
Bone forming in a salivary cyst causing facial swelling in a Shih Tzu
By Fernandes, Thaís R et al.·Published in BMC veterinary research·2012·Serviç, Brazil·View original on PubMed →
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Original publication title: Ectopic ossification presenting as osteoid metaplasia in a salivary mucocele in a Shih Tzu dog.
- Species:
- dog
Plain-English summary
A 4-year-old female Shih Tzu was brought to the vet with a sudden swelling on the right side of her face. The vet found a soft, fluid-filled mass, which turned out to be a salivary mucocele, a condition where saliva accumulates in a cavity. Unusually, the mass also contained bone-forming cells due to irritation from small stones in the salivary gland (sialoliths). While this type of condition is rare in dogs, the vet was able to identify it and monitor the situation.
People also search for: Shih Tzu face swelling · salivary mucocele treatment · dog bone growth in salivary gland
Abstract
BACKGROUND: Salivary mucocele is an accumulation of saliva in a single or multiloculated cavity lined by connective tissue that is contiguous to a salivary gland-duct complex and is the most common condition affecting the salivary glands in dogs. Occasionally, different types of metaplastic lesions, such as squamous and osseous metaplasia - which are rare lesions in animals - can be observed in association with salivary mucocele. CASE PRESENTATION: A right facial enlargement was suddenly observed in a 4-year-old non-spayed female Shih-Tzu dog. The lesion presented itself as a soft and fluctuant mass located in the right side of the face near to the neck. Histologically, the mass consisted of a cavitary formation without an epithelial lining. Additionally, microscopic examination revealed the presence of osteoid-producing cells which gave rise to areas of bone formation, probably induced by irritation due to the presence sialoliths. Such cells and bone formations were also present in the cavity wall, consequently leading us to classify the condition as a salivary mucocele with osseous metaplasia. CONCLUSIONS: In the present case, the pathogenesis was probably associated with the presence of sialoliths, which can behave as etiological agents for the metaplastic lesion. The occurrence of osteoid metaplasia is a rare peculiar condition in the canine salivar y gland, and due to the rarity and lack of information about this specific disease, no clinical data can yet be associated with the development of salivary mucocele with osseous metaplasia in dogs.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/22296807/