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Related Experiment Videos

Microscopic colitis.

Darrell S Pardi1

  • 1Division of Gastroenterology and Hepatology and Internal Medicine, Mayo Clinic, Rochester, Minn 55905, USA. pardi.darrell@mayo.edu

Mayo Clinic Proceedings
|May 15, 2003
PubMed
Summary
This summary is machine-generated.

Microscopic colitis, including collagenous and lymphocytic subtypes, causes chronic watery diarrhea. Diagnosis relies on colon biopsies showing specific inflammatory patterns, with treatment often managed stepwise.

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Area of Science:

  • Gastroenterology
  • Pathology
  • Internal Medicine

Background:

  • Microscopic colitis encompasses collagenous and lymphocytic colitis, presenting as chronic watery diarrhea.
  • It accounts for 10% of chronic watery diarrhea cases, often with abdominal pain and mild weight loss.
  • Diagnosis typically occurs in older adults (60-80 years) with a female predominance.

Purpose of the Study:

  • To describe the clinical and histological features of microscopic colitis subtypes.
  • To highlight diagnostic methods and therapeutic approaches for microscopic colitis.

Main Methods:

  • Diagnosis is confirmed via colonic biopsy.
  • Biopsies reveal intraepithelial lymphocytosis and lamina propria inflammation.
  • Endoscopic and radiographic findings of the colon are typically normal.

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Main Results:

  • Collagenous colitis is characterized by a thickened subepithelial collagen band.
  • Lymphocytic colitis shows intraepithelial lymphocytosis without significant collagen deposition.
  • Both subtypes share clinical similarities but differ histologically.

Conclusions:

  • Microscopic colitis requires colon biopsy for definitive diagnosis.
  • A stepwise therapeutic strategy generally achieves symptom control.
  • Further controlled treatment trials are needed for established therapies.