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Diagnosing celiac disease: A critical overview.

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The Marsh classification significantly improved celiac disease (CD) diagnosis by broadening criteria for gluten-free diets. However, its subclassification offers limited clinical value and may be outdated with new diagnostic approaches.

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Area of Science:

  • Gastroenterology
  • Immunology
  • Pathology

Background:

  • Celiac disease (CD) diagnosis has evolved beyond malabsorption and severe lesions.
  • The Marsh classification, based on biopsy, identifies gluten-induced mucosal changes and immune responses.
  • This classification expanded diagnostic criteria, enabling more patients to access gluten-free diets.

Purpose of the Study:

  • To evaluate the clinical utility of the Marsh classification in diagnosing celiac disease.
  • To assess the impact of Marsh subclassification on diagnosis, treatment, and prognosis.
  • To explore future diagnostic approaches for celiac disease.

Main Methods:

  • Review of the Marsh classification's historical development and application in celiac disease diagnosis.
  • Analysis of the immunopathological spectrum of gluten-induced mucosal changes.
  • Consideration of emerging diagnostic techniques and research areas.

Main Results:

  • The Marsh classification broadened diagnostic criteria, allowing more patients access to gluten-free diets.
  • Revisions to the Marsh classification have not improved interpretation of mucosal pathology.
  • Marsh 3 subclassification adds workload for pathologists without aiding clinical decisions.

Conclusions:

  • Gastroenterologists often disregard Marsh 3 subclassification, suggesting its reporting is unnecessary.
  • New diagnostic methods, including molecular techniques and stem cell research, may be needed for evaluating mucosal pathology in CD.
  • Pathologists should reconsider reporting Marsh 3 subclassification given its limited clinical impact.