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Related Experiment Videos

Metastatic thymic lymphosarcoma in a calf.

K L Angel1, J Stott, J W Tyler

  • 1Department of Large Animal Surgery and Medicine, College of Veterinary Medicine, Auburn University, AL 36849-5522.

Journal of the American Veterinary Medical Association
|May 15, 1991
PubMed
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A rare case of metastatic thymic lymphosarcoma in a heifer showed widespread organ involvement. Flow cytometry suggested an immature T-cell origin, despite lacking typical T-lymphocyte markers.

Area of Science:

  • Veterinary Pathology
  • Immunophenotyping
  • Oncology

Background:

  • Thymic lymphosarcoma is a rare malignancy in cattle.
  • This case presents a unique presentation of metastatic thymic lymphosarcoma in a young heifer.

Observation:

  • A 16-month-old heifer exhibited progressive weight loss, cachexia, and a large neck mass.
  • Neoplastic lymphocytes were found in pleural effusion and bone marrow.
  • Necropsy revealed tumor metastasis to lymphoid tissue, liver, intestine, heart, and kidney.

Findings:

  • Flow cytometry analysis indicated that 65% of the leukemic cells had an immature phenotype.
  • The cells expressed low levels of T-lymphocyte markers (BoCD2), B-lymphocyte markers, and monocyte markers.
  • The leukemic cell population did not express traditional T-lymphocyte surface markers.

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Implications:

  • This case expands the known spectrum of organ involvement in thymic lymphosarcoma.
  • The findings suggest a potential early-stage T-cell differentiation block in this bovine lymphosarcoma.
  • Further research into the immunophenotype of bovine lymphosarcoma is warranted.