Peer-reviewed veterinary case report
Dog found with jelly-like fluid and muscle nodules in hind leg
By Izawa, Takeshi et al.·Published in The Journal of veterinary medical science·2012·Osaka Prefecture University, Japan·View original on PubMed →
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Original publication title: Incidental synovial myxoma with extensive intermuscular infiltration in a dog.
- Species:
- dog
Plain-English summary
A 16-year-old male mixed-breed dog was put to sleep due to worsening kidney failure caused by cancer in his left kidney. During the examination, vets found jelly-like fluid and multiple nodules in the muscles of his right hind leg, which were linked to a type of tumor called synovial myxoma. This tumor can occur between muscles and may not always show obvious symptoms in the joints or muscles. Unfortunately, the dog's condition was too severe for treatment, leading to his euthanasia.
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Abstract
A 16-year-old male mixed-breed dog was euthanized due to progression of renal failure caused by renal adenocarcinoma in the left kidney. Apart from main symptomatic lesion, accumulation of transparent jelly-like fluid was observed between the right femoral muscles. Gross examination of the right hindlimb revealed multiple nodules in the articular surface and capsule of the stifle joints, which extended into the crural muscles. Histopathologically, the joint and intermuscular masses were characterized by variously-sized hypocellular nodules consisting of spindle to stellate cells suspended in an abundant myxoid matrix. There were cystic structures within the intermuscular masses, lined by synoviocyte-like cells. Based on the gross and histopathologic findings, the case was diagnosed as synovial myxoma with extensive intermuscular infiltration. Synovial myxoma should be considered in the differential diagnosis of dogs with myxomatous tumor between skeletal muscles, even in absence of joint or muscle symptoms.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/22785568/