Peer-reviewed veterinary case report
Cat with rare skin tumor called extraskeletal mesenchymal
By Romanucci, Mariarita et al.·Published in Veterinary dermatology·2005·Department of Comparative Biomedical Sciences, Italy·View original on PubMed →
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Original publication title: Cutaneous extraskeletal mesenchymal chondrosarcoma in a cat.
- Species:
- cat
Plain-English summary
A 4-year-old male cat was brought to the vet because of a fixed lump in the lower back area that didn’t move. After examining the lump, the vet found it was a type of tumor called extraskeletal mesenchymal chondrosarcoma, which is made up of abnormal cells and cartilage. The cat underwent surgery to remove the tumor, and six months later, there have been no signs of the tumor coming back or spreading to other parts of the body.
People also search for: cat lump on back · cat tumor treatment · extraskeletal chondrosarcoma in cats · cat surgery recovery · signs of cat cancer
Abstract
A 4-year-old, male cat was presented with a fixed, subcutaneous mass in the lumbosacral region. A histopathological examination revealed a well-defined but nonencapsulated neoplasm characterized by a proliferation of predominantly spindle cells, with high mitotic activity. Interspersed between these cells were single cellular elements with chondroid differentiation. Large areas of cartilaginous tissue with foci of endochondral ossification, necrosis and myxoid tissue were also observed within the neoplastic parenchyma. A diagnosis of extraskeletal mesenchymal chondrosarcoma was made based on the histological pattern - characterized by the coexistence of cartilaginous islands and undifferentiated mesenchymal cells, results of Alcian blue staining at various pH, immunohistochemical reactivity against vimentin and S-100, and the absence of skeletal involvement or other primary tumour sites. Clinical history of the cat excluded traumas, vaccinations or other types of subcutaneous inoculation. Six months on from surgical treatment, neither recurrence nor metastases have been detected.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/15842543/