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Ileal lymphoma in swine

T Tanimoto1, A Minami, S Yano

  • 1Chuo Meat Inspection Laboratory, Kochi Prefecture, Japan.

Veterinary Pathology
|November 1, 1994
PubMed
Summary

Swine alimentary lymphoma, primarily affecting the ileum and Peyer's patches, presents as diffuse large B-cell type. This study details its unique characteristics compared to feline and human cases.

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Area of Science:

  • Veterinary Pathology
  • Oncology
  • Comparative Pathology

Background:

  • Alimentary lymphoma in swine is uncommon, with limited data on its specific characteristics.
  • Meat inspection in Kochi, Japan, identified 26 cases of swine lymphoma, including 11 alimentary cases.

Purpose of the Study:

  • To characterize the histopathological and immunohistochemical features of alimentary lymphoma in swine.
  • To compare swine alimentary lymphoma with similar conditions in felines and humans.

Main Methods:

  • Histopathological examination of 11 ileal lymphoma cases.
  • Immunohistochemical staining for cell markers and immunoglobulins.
  • Ultrastructural analysis.
  • Comparison with feline and human alimentary lymphoma data.

Main Results:

  • Ileal lymphomas originated in Peyer's patches with early lymph node involvement.
  • Neoplasms were predominantly diffuse, large, noncleaved cell lymphomas (10/11).
  • Distinctive features included "starry sky" histiocytes, "Indian file" infiltration, transserosal metastasis, and IgM-lambda immunoglobulin expression.

Conclusions:

  • Swine alimentary lymphoma exhibits distinct features, particularly its origin in Peyer's patches and predominantly large B-cell type.
  • These findings aid in differentiating swine alimentary lymphoma from feline and human counterparts.

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