Implementation of IBD-DCA for ulcerative colitis: a single-institution experience.

Area of Science:

• Gastroenterology
• Histopathology
• Clinical Diagnostics

Background:

• Ulcerative colitis (UC) diagnosis is complex and impacts patient quality of life.
• Standardized reporting is crucial for consistent UC diagnosis and management.
• The Inflammatory Bowel Disease-Distribution, Chronicity, Activity (IBD-DCA) scoring system was developed for standardized colonic biopsy reporting in UC.

Purpose of the Study:

• To assess the adoption rate of the IBD-DCA scoring system within a specific department.
• To correlate histological findings from the IBD-DCA system with the UC Endoscopic Index of Severity (UCEIS).
• To evaluate the utility of the IBD-DCA system in clinical practice and future research.

Main Methods:

• Retrospective review of 449 Inflammatory Bowel Disease (IBD) biopsies, with 291 confirmed UC cases.
• Analysis of the uptake rate of the IBD-DCA reporting format across different biopsy sites.
• Kendall's tau correlation analysis between IBD-DCA reported histological activity and UCEIS scores for 116 UC cases.

Main Results:

• IBD-DCA reporting format adoption exceeded 95% for UC biopsies.
• A moderate positive correlation was observed between histological activity (IBD-DCA) and all components of UCEIS (τ > 0.260, p < 0.05).
• Variations in applying the IBD-DCA system were noted for rectal biopsies, and discrepancies between histology and endoscopy were identified.

Conclusions:

• The IBD-DCA system demonstrates high uptake and correlates moderately with endoscopic severity in UC.
• Histological-endoscopic discrepancies may arise from sampling differences or the pan-colonic nature of UCEIS.
• The study advocates for IBD-DCA's use in clinical trials for relapse prediction and treatment guidance.