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Primary ureteral giant cell sarcoma in a Pomeranian
Johanna D Rigas1, Thomas J Smith, M Elena Gorman
1Department of Biomedical Sciences, College of Veterinary Medicine, Oregon State University, Corvallis, OR 97331-4801, USA. rigasj@vetmed.wsu.edu
Veterinary Clinical Pathology
|January 21, 2012
Summary
A Pomeranian dog developed a rare ureteral sarcoma, a type of cancer. This case report details the surgical removal and diagnosis of this unusual canine tumor.
Area of Science:
- Veterinary Oncology
- Canine Pathology
Background:
- Hydronephrosis and cranial abdominal masses can indicate serious underlying conditions in dogs.
- Ureteral masses are uncommon causes of these clinical signs in veterinary medicine.
Observation:
- Exploratory surgery revealed a primary ureteral mass in an 8-year-old Pomeranian dog.
- Cytologic and histologic examination identified three distinct cell populations: multinucleated giant cells, spindle-shaped cells, and transitional epithelial cells.
Findings:
- The tumor was diagnosed as a giant cell sarcoma, confirmed by immunohistochemistry.
- Immunoreactivity for vimentin and S-100 in tumor cells, with negative staining for various markers, supported an anaplastic sarcoma with giant cells diagnosis.
- This represents the first reported case of primary ureteral giant cell sarcoma in a dog.
Implications:
- This case expands the understanding of rare soft tissue sarcomas in veterinary oncology.
- Highlights the importance of thorough diagnostic evaluation for unusual presentations of abdominal masses in dogs.
- Provides valuable data for future research into canine ureteral tumors and their treatment.
