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Area of Science:

  • Gastroenterology
  • Endoscopy
  • Histopathology

Background:

  • Ulcerative colitis (UC) management requires accurate assessment of disease activity and prediction of relapse.
  • Endocytoscopy (EC) offers a high-magnification view during endoscopy, potentially revealing detailed mucosal features.
  • Current methods for assessing UC activity may not fully capture microscopic inflammatory changes or predict long-term outcomes.

Purpose of the Study:

  • To explore the association between endocytoscopy (EC) classification and microscopic inflammatory features in ulcerative colitis (UC).
  • To evaluate the predictive value of EC classification for disease relapse in UC patients.
  • To correlate EC findings with endoscopic severity (Mayo endoscopic subscores) and clinical disease state.

Main Methods:

  • 32 mild-to-moderate UC patients underwent EC, with appearances stratified into four categories (EC-A to EC-D).
  • Microscopic features (inflammatory infiltrates, crypt abscess, goblet cell depletion) were assessed by a pathologist blinded to clinical data.
  • Clinical follow-up for over 60 months assessed disease relapse in 22 patients.

Main Results:

  • EC classification showed excellent interobserver agreement (κ=0.77).
  • EC-A correlated with remission and low endoscopic scores (MES0-1), while EC-C/D indicated active disease.
  • No EC-A patients experienced relapse during follow-up, unlike other groups.

Conclusions:

  • EC stratification is significantly associated with UC-specific microscopic features and clinical disease activity.
  • EC classification demonstrates predictive value for UC relapse, offering a novel tool for disease management.
  • Endocytoscopy is a reliable method for assessing microscopic features relevant to UC activity and prognosis.