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Related Experiment Videos

Can ischemic colitis be differentiated from C difficile colitis in biopsy specimens?

C R Dignan1, J K Greenson

  • 1Department of Pathology, University of Michigan Hospitals, Ann Arbor 48109-0054, USA.

The American Journal of Surgical Pathology
|June 1, 1997
PubMed
Summary

Histologic features can differentiate pseudomembranous colitis caused by Clostridium difficile from ischemic colitis. Hyalinization of the lamina propria is a specific marker for ischemia, while diffuse pseudomembranes suggest C. difficile.

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Area of Science:

  • Gastroenterology
  • Pathology
  • Colorectal Diseases

Background:

  • Pseudomembranous colitis can stem from Clostridium difficile infection or colonic ischemia.
  • Distinguishing between these causes based on histology is crucial for appropriate patient management.

Purpose of the Study:

  • To identify specific histological features that differentiate pseudomembranous colitis caused by Clostridium difficile from that caused by ischemia.
  • To evaluate the diagnostic utility of lamina propria hyalinization and atrophic micro-crypts.

Main Methods:

  • Analysis of 49 colon biopsies with pseudomembranous colitis (25 C. difficile, 24 ischemia).
  • Evaluation for variables including mucosal necrosis, lamina propria hyalinization, and atrophic micro-crypts.
  • Correlation of histological findings with endoscopic observations.

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Main Results:

  • Lamina propria hyalinization was present in 19 ischemic cases but absent in C. difficile colitis (p < 0.0001).
  • Atrophic micro-crypts were observed in 18 ischemic and 6 C. difficile cases (p < 0.0006).
  • Hemorrhage, full-thickness necrosis, and diffuse pseudomembranes were more common in ischemia; localized masses/polyps seen exclusively in ischemia.

Conclusions:

  • Lamina propria hyalinization is a sensitive and specific histological marker for ischemic colitis with pseudomembranes.
  • Atrophic micro-crypts, hemorrhage, full-thickness necrosis, and endoscopic polyps/masses also suggest ischemia.
  • Diffuse pseudomembranes on endoscopy favor C. difficile colitis.