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Lymphoplasmacytic lymphoma in a stallion
K Fukunaga1, M Ninomiya, Y Oohara
1Chuo Meat Inspection Office, Kochi, Japan.
The Journal of Veterinary Medical Science
|June 1, 1993
Summary
A rare B-cell lymphoma was identified in a stallion, characterized by a mediastinal mass and lymph node involvement. This equine lymphoma shows neoplastic cells with varying differentiation stages, suggesting a B-cell origin.
Area of Science:
- Veterinary Pathology
- Oncology
- Immunohistochemistry
Background:
- Lymphoplasmacytic lymphoma is a type of non-Hodgkin lymphoma.
- Equine lymphomas can present with diverse clinical and histological features.
- Understanding the origin of neoplastic cells is crucial for diagnosis and prognosis.
Observation:
- A 6-year-old Anglo-Arabian stallion presented with a large mediastinal mass and generalized lymphadenopathy.
- Histological examination revealed neoplastic cells in various differentiation stages, including lymphocytes and plasma cells.
- Immunohistochemical analysis showed positive cytoplasmic reactivity for mu and lambda chains in some neoplastic cells.
Findings:
- Ultrastructural examination demonstrated well-developed rough endoplasmic reticulum (RER) and Golgi complexes in plasmacytoid cells.
- Other lymphoid cells exhibited less developed RER or scattered RER strands.
- The cellular morphology and immunophenotype are consistent with a B-cell neoplasm.
Implications:
- This study characterizes a rare case of lymphoplasmacytic lymphoma in an equine patient.
- The findings support the B-cell origin of this equine lymphoma.
- Further research into equine B-cell lymphomas can improve diagnostic accuracy and therapeutic strategies.