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Normal quantity and distribution of mast cells and eosinophils in the pediatric colon

Ali G Saad1

  • 1Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA. agsaad@uams.edu

Pediatric and Developmental Pathology : the Official Journal of the Society for Pediatric Pathology and the Paediatric Pathology Society
|February 24, 2011
PubMed

Insights

This study establishes baseline counts for mast cells (MCs) and eosinophils in the pediatric colon. Findings reveal distinct distributions across colonic segments, offering crucial reference data for gastrointestinal health.

Area of Science:

  • Gastroenterology
  • Pediatric Pathology
  • Immunology

Background:

  • Normal counts and distribution of mast cells (MCs) and eosinophils in the pediatric colon are not well-established.
  • Understanding these baseline cellular populations is crucial for diagnosing inflammatory and allergic conditions in children.
  • Previous research has not comprehensively detailed the regional variations of these immune cells within the pediatric colon.

Purpose of the Study:

  • To determine the normal number and distribution of mast cells (MCs) and eosinophils in the colonic mucosa of pediatric patients.
  • To establish reference ranges for these immune cells across different segments of the pediatric colon (cecum to descending colon).
  • To investigate potential differences in MC and eosinophil counts between sexes in the pediatric colon.

Main Methods:

  • Analysis of colonic biopsies obtained from 41 pediatric patients (mean age 11.72 years) undergoing endoscopic examinations.
  • Quantification of eosinophils and mast cells (MCs) per high-power field (hpf) in the lamina propria, surface epithelium, and crypt epithelium.
  • Statistical comparison of cell counts across different colonic segments and between male and female patients.

Main Results:

  • Eosinophil counts decreased from the cecum to the descending colon, with a peak in the rectosigmoid.
  • Mast cell (MC) counts were highest in the descending colon and lowest in the rectosigmoid; no MCs were found in the surface epithelium.
  • Females exhibited higher MC counts in the cecum and descending colon compared to males (P < 0.05).

Conclusions:

  • This study provides essential baseline data for eosinophil and mast cell (MC) populations in the pediatric colon.
  • The findings highlight significant regional variations in cell distribution throughout the pediatric colon.
  • Established reference values can aid in the accurate diagnosis and management of pediatric gastrointestinal disorders.

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