Peer-reviewed veterinary case report
Cat with rare bone tumor in duodenum and abdomen spread
By Lean, Fabian Z X et al.·Published in Journal of comparative pathology·2025·Department of Pathobiology & Population Sciences, United Kingdom·View original on PubMed →
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Original publication title: Primary extraskeletal duodenal osteosarcoma with peritoneal sarcomatosis in a cat.
- Species:
- cat
Plain-English summary
An 11-year-old female Domestic Longhair cat was brought to the vet after two weeks of not eating well, being very tired, vomiting, and drinking a lot of water. The vet found a mass in her abdomen, and tests showed that she had a rare type of bone cancer called extraskeletal osteosarcoma in her intestines, which had spread to her liver and other areas. Unfortunately, despite the findings, the cat's condition was severe, and she did not survive. This case highlights the importance of recognizing such rare cancers in cats.
People also search for: cat vomiting and lethargy · cat cancer symptoms · cat not eating treatment
Abstract
This case report describes an extraskeletal intestinal osteosarcoma with sarcomatosis in an 11-year-old female neutered Domestic Longhair cat that presented with a 2-week history of hyporexia, lethargy, vomiting and polydipsia. Clinical examination identified a cranial abdominal mass and ultrasound examination revealed liver nodules and an irregularly shaped, partly mineralized mass around the proximal duodenum and pancreas. Cytological examination of the intestinal and liver lesions identified plump to fusiform to stellate cells with scattered foci of mineralization. Post-mortem examination identified an extraskeletal intestinal osteosarcoma originating in the wall of the duodenum with sarcomatosis on the serosal surface of the liver, gallbladder and omentum. Local infiltration into the pancreas, liver and diaphragm was also present. Increased awareness and reporting of sarcomatosis in cats are important for expanding the knowledge base, guiding clinical management and understanding its impact on survival in such rare cases.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/40233452/