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Morphological and immunological characteristics of the bovine temporal lymph node and hemal node

Christophe R Casteleyn1, Sofie Breugelmans, Paul Simoens

  • 1Department of Morphology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium. Christophe.Casteleyn@UGent.be

Veterinary Immunology and Immunopathology
|October 28, 2008
PubMed

Insights

Cattle temporal regions contain lymph nodes and hemal nodes in 89% of animals. These nodes, similar to other cranial nodes, drain the forehead, eyelid, horn base, and temporal muscle.

Area of Science:

  • Veterinary Anatomy
  • Immunology

Background:

  • Lymph nodes and hemal nodes are crucial components of the immune system in various species.
  • Their presence and function in the temporal region of cattle have not been extensively documented.

Purpose of the Study:

  • To investigate the presence, characteristics, and drainage patterns of lymph nodes and hemal nodes in the temporal region of cattle.
  • To characterize the cellular composition of these nodes using immunohistochemistry and flow cytometry.
  • To propose a standardized anatomical name for the identified lymph node.

Main Methods:

  • Anatomical dissection of the temporal regions of 62 cattle.
  • India ink injections to determine lymphatic drainage areas.
  • Immunohistochemistry and flow cytometry for cellular analysis.

Main Results:

  • Lymph nodes and hemal nodes were identified in 89% of the examined cattle.
  • Lymph nodes constituted 60% and hemal nodes 40% of the identified nodes.
  • Nodes were typically round, 1-9mm in diameter, and drained the forehead, upper eyelid, horn base, and temporal muscle.
  • Cellular composition of these nodes was found to be similar to other cranial lymph nodes.

Conclusions:

  • The temporal region of cattle harbors distinct lymph nodes and hemal nodes with specific drainage territories.
  • The proposed name 'temporal lymph node' (lymphonodus temporalis) is recommended for this anatomical structure.
  • Further research into the immunological role of these nodes is warranted.

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