Korean J Vet Res.
2024 Sep;64(3):e25. 10.14405/kjvr.20240040.
A case of feline extramedullary plasma cell tumor with T cell infiltration
- Affiliations
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- 1College of Veterinary Medicine, Jeju National University, Jeju 63243, Korea
- 2Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Jeju National University, Jeju 63243, Korea
- 3Research Institute of Veterinary Medicine, College of Veterinary Medicine, Jeju National University, Jeju 63243, Korea
- 4Department of Veterinary Internal Medicine, Wildlife Rescue Center, College of Veterinary Medicine, Jeju National University, Jeju 63243, Korea
- 5Diagnostic Laboratory Medicine, College of Veterinary Medicine, Jeju National University, Jeju 63243, Korea
- KMID: 2563682
- DOI: http://doi.org/10.14405/kjvr.20240040
Abstract
- A 7-year-old castrated male Persian cat presented with a cutaneous mass and an increase in serum amyloid A concentration. Fine needle aspirates of the mass indicated lymphoma, which was also the top differential diagnosis on histopathologic examinations. Immunohistochemically, neoplastic cells tested negative for anti-CD3, PAX5, CD20, and c-Kit, but positive for MUM1, CD79α, and CD138, suggesting extramedullary plasmacytoma. There were tumor-infiltrating non-neoplastic CD3+ T and CD20+ B cells. Practitioners should be aware of feline plasmacytoma characterized by lymphoma-like cytologic and histologic features. The present study is valuable in providing the first clinical evidence that proves the immunogenicity of feline plasmacytoma.
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