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Related Experiment Videos

Canine indolent nodular lymphoma.

V E Valli1, W Vernau, L-P de Lorimier

  • 1Department of Pathobiology, College of Veterinary Medicine, University of Illinois, Room 284 SAC, 1008 W Hazelwood Dr., Urbana, IL, 61802, USA. vevalli@uiuc.edu

Veterinary Pathology
|May 5, 2006
PubMed
Summary

Indolent canine lymphomas, including B-cell and T-cell types, are not rare and exhibit slow growth. Immunophenotyping and molecular clonality testing aid in diagnosing these slow-progressing canine lymphoid tumors.

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Area of Science:

  • Veterinary Pathology
  • Canine Oncology
  • Hematopathology

Background:

  • Indolent lymphoid proliferations in dogs are often underrecognized.
  • These conditions encompass various B-cell and T-cell lymphomas.
  • Accurate diagnosis is crucial for appropriate management and prognosis.

Purpose of the Study:

  • To review and characterize indolent canine lymphoid proliferations.
  • To evaluate the utility of immunophenotyping and molecular clonality in diagnosis.
  • To assess the clinical behavior and survival associated with these conditions.

Main Methods:

  • Retrospective review of 66 canine lymphoid proliferation cases.
  • Immunohistochemistry for B-cell (CD79a+) and T-cell (CD3+) markers.
  • Molecular analysis of immunoglobulin heavy chain (IGH) and T-cell receptor gamma (TCRG) gene rearrangements for clonality assessment.

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Main Results:

  • B-cell lymphomas, particularly marginal zone lymphoma (MZL), predominated.
  • High rates of clonality were detected: 80% for MZL, 100% for follicular lymphoma (FL) and mantle cell lymphoma (MCL).
  • Indolent B-cell and T-zone lymphomas (TZL) showed prolonged survival.

Conclusions:

  • Indolent canine lymphomas are a significant group of neoplasms that may be underdiagnosed.
  • Immunophenotyping and molecular clonality are essential tools for accurate diagnosis and classification.
  • These lymphomas are characterized by indolent behavior and favorable prognoses.