Linfoma multicêntrico de Células T em uma potra Crioula

Authors

DOI:

https://doi.org/10.5433/1679-0359.2020v41n2p725

Keywords:

Horse, Lymphadenopathy, Neoplasia, T lymphocytes.

Abstract

A 2-year-old creole filly was referred to us for evaluation because of the clinical suspicion of infection by Streptococcus equi. It presented with progressive weight loss and increased volume of the submandibular, retropharyngeal, and precrural lymph nodes. General clinical examinations and laboratory tests revealed dehydration, anemia, leukopenia, hyperfibrinogenemia, and thrombocytopenia. The initial treatment for equine adenitis did not achieve significant results, and new hematological and biochemical tests and lymph node cytology by puncture were performed. Cytology revealed cells compatible with neoplastic lymphocytes, resulting in the suspicion of lymphoma. The animal died from general weakness and was sent for autopsy. Macroscopically, generalized lymphadenomegaly and splenomegaly were observed, with multiple nodules and tumor lesions in the splenic parenchyma. There was an irregular nodule in the medullary layer of the right kidney. The liver and lungs were slightly enlarged, with petechiae and multifocal suffusions. Histopathological evaluation of different organ specimens revealed intense proliferation of the neoplastic lymphoid cells, invading the adjacent tissues, with moderate cellular pleomorphism. Immunohistochemistry of the lymph node sections with neoplastic infiltration revealed multicentric T-cell lymphoma. In horses, cases of lymphomas are rare and should be differentiated from other causes that induce lymphadenomegaly in this species.

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Author Biographies

Andrielli Trentim Pereira, Universidade Federal do Pampa

Discente Programa de Pós-Graduação em Ciência Animal, Universidade Federal do Pampa, UNIPAMPA, Uruguaiana, RS, Brasil.

Ana Paula Maurique Pereira, Universidade Federal do Pampa

Discente Programa de Pós-Graduação em Ciência Animal, Universidade Federal do Pampa, UNIPAMPA, Uruguaiana, RS, Brasil.

Inácio Manassi da Conceição Brandolt, Universidade Federal do Pampa

Discente Programa de Pós-Graduação em Ciência Animal, Universidade Federal do Pampa, UNIPAMPA, Uruguaiana, RS, Brasil.

Ricardo Pozzobon, Universidade Federal do Pampa

Prof., UNIPAMPA, Uruguaiana, RS, Brasil.

Márcio Machado Costa, Universidade Federal do Pampa

Prof., UNIPAMPA, Uruguaiana, RS, Brasil.

Bruno Leite dos Anjos, Universidade Federal do Pampa

Prof., UNIPAMPA, Uruguaiana, RS, Brasil.

Saulo Pavarini, Universidade Federal do Rio Grande do Sul

Setor de Patologia Veterinária, SPV, Faculdade de Veterinária, FaVet, Universidade Federal do Rio Grande do Sul, UFRGS, Porto Alegre, RS, Brasil.

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Published

2020-03-06

How to Cite

Pereira, A. T., Pereira, A. P. M., Brandolt, I. M. da C., Pozzobon, R., Costa, M. M., Anjos, B. L. dos, & Pavarini, S. (2020). Linfoma multicêntrico de Células T em uma potra Crioula. Semina: Ciências Agrárias, 41(2), 725–730. https://doi.org/10.5433/1679-0359.2020v41n2p725

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Case Reports

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