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Penile extramedullary plasmacytoma in a dog
Min-Su Kim1, Dong Hoo Kim, Ul Soo Choi
11Department of Veterinary Surgery, College of Veterinary Medicine, Chonbuk National University, Jeonju, Korea.
Reproduction in Domestic Animals = Zuchthygiene
|November 19, 2009
Summary
A rare penile extramedullary plasmacytoma (EMP) was diagnosed in a 5-year-old male cocker spaniel. This case highlights the importance of diagnostic evaluation for unusual canine penile masses.
Area of Science:
- Veterinary Pathology
- Canine Oncology
Background:
- Penile tumors are uncommon in canine patients.
- Extramedullary plasmacytoma (EMP) is a neoplastic condition affecting plasma cells outside the bone marrow.
Observation:
- A 5-year-old male Cocker Spaniel presented with a 1.3 cm penile mass.
- Cytological and histopathological examinations revealed neoplastic cells with plasma cell morphology, including eccentric nuclei and basophilic cytoplasm.
- Nuclear pleomorphism, giant cells, and bi-nucleation were noted, along with plasmacytic differentiation at the periphery.
Findings:
- Immunohistochemical staining confirmed neoplastic cells were positive for MUM1 and light lambda chain.
- The diagnostic findings supported a diagnosis of penile extramedullary plasmacytoma.
Implications:
- This case contributes to the understanding of rare penile neoplasms in dogs.
- Accurate diagnosis of canine penile EMP is crucial for appropriate treatment and prognosis.
- Further research into the behavior and treatment of canine penile EMP is warranted.
