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Updated: Feb 6, 2026
07:55
Establishment of a Primary Culture of Patient-derived Soft Tissue Sarcoma
Published on: April 11, 2018
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Soft tissue sarcoma in a short-beaked echidna (Tachyglossus aculeatus)
R L Robey1, C Sangster1, M Gabor2
1Taronga Zoo, Mosman, New South Wales, Australia.
Australian Veterinary Journal
|August 29, 2018
Summary
This case report details a rare malignant sarcoma in a short-beaked echidna, a monotreme mammal. Further research is needed to understand stromal tumors in these unique animals.
Area of Science:
- Veterinary Pathology
- Comparative Oncology
- Monotreme Biology
Background:
- Neoplasia in prototherian mammals (monotremes) is infrequently documented.
- Mass lesions in monotremes are often presumed inflammatory or traumatic.
- This study investigates a rare tumor in a short-beaked echidna.
Observation:
- An adult male short-beaked echidna presented with a large, ulcerated facial mass.
- Clinical pathology revealed neutrophilia, anemia, elevated liver enzymes, and azotaemia.
- Incisional biopsy diagnosed a malignant spindle cell proliferation (sarcoma).
Findings:
- The sarcoma was poorly differentiated and not amenable to surgical excision.
- Immunohistochemistry was negative for cytokeratin, desmin, smooth muscle actin, periaxin, and MAC387.
- The definitive histogenesis of the tumor remained undetermined.
Implications:
- This is the first report and immunohistochemical characterization of a stromal tumor in a monotreme.
- Malignant neoplasia should be considered in the differential diagnosis of facial masses in monotremes.
- This case highlights the importance of considering rare neoplastic conditions in wildlife medicine.
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