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Related Experiment Videos

Neuronal hypertrophy in acute appendicitis.

S Xiong1, P Puri, L Nemeth

  • 1Children's Research Centre, Our Lady's Hospital for Sick Children, Crumlin, Dublin 12, Ireland.

Archives of Pathology & Laboratory Medicine
|October 18, 2000
PubMed
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Acute appendicitis involves changes in the enteric nervous system and mast cells, suggesting chronic inflammation rather than a single acute event. This challenges current understanding of appendicitis pathogenesis.

Area of Science:

  • Gastroenterology
  • Immunology
  • Neuroscience

Background:

  • The exact cause of appendicitis is not fully understood.
  • The enteric nervous system plays a role in immune regulation and inflammation.

Purpose of the Study:

  • To investigate the state of the enteric nervous system in normal and inflamed appendixes.
  • To characterize neural and mast cell components in acute appendicitis.

Main Methods:

  • Immunohistochemical staining of appendix tissues from patients with acute appendicitis and controls.
  • Quantitative image analysis of ganglia, nerve fibers, Schwann cells, and mast cells.

Main Results:

  • Significantly increased numbers of nerve fibers, Schwann cells, and enlarged ganglia in acute appendicitis appendixes.

Related Experiment Videos

  • Elevated mast cell counts observed in various layers of inflamed appendixes.
  • Neural and mast cell changes were also noted in some histologically normal appendixes from patients with appendicitis.

    • Conclusions:

    • The observed neural and mast cell increases suggest a chronic underlying condition, possibly from repeated inflammation or obstruction.
    • These findings indicate that acute appendicitis may result from chronic abnormalities, challenging existing pathophysiological models.
    • The study highlights the complex interplay between the enteric nervous system, immune cells, and appendicitis development.