Histologic Inflammation Is a Risk Factor for Progression to Colorectal Neoplasia in Ulcerative Colitis: A Cohort Study

Roopali Bansal Gupta, Noam Harpaz, Steven Itzkowitz, Sabera Hossain, Sierra Matula, Asher Kornbluth, Carol Bodian, Thomas Ullman

Research output: Contribution to journalArticle

496 Scopus citations

Abstract

Background & Aims: Although inflammation is presumed to contribute to colonic neoplasia in ulcerative colitis (UC), few studies have directly examined this relationship. Our aim was to determine whether severity of microscopic inflammation over time is an independent risk factor for neoplastic progression in UC. Methods: A cohort of patients with UC undergoing regular endoscopic surveillance for dysplasia was studied. Degree of inflammation at each biopsy site had been graded as part of routine clinical care using a highly reproducible histologic activity index. Progression to neoplasia was analyzed in proportional hazards models with inflammation summarized in 3 different ways and each included as a time-changing covariate: (1) mean inflammatory score (IS-mean), (2) binary inflammatory score (IS-bin), and (3) maximum inflammatory score (IS-max). Potential confounders were analyzed in univariate testing and, when significant, in a multivariable model. Results: Of 418 patients who met inclusion criteria, 15 progressed to advanced neoplasia (high-grade dysplasia or colorectal cancer), and 65 progressed to any neoplasia (low-grade dysplasia, high-grade dysplasia, or colorectal cancer). Univariate analysis demonstrated significant relationships between histologic inflammation over time and progression to advanced neoplasia (hazard ration (HR), 3.0; 95% CI: 1.4-6.3 for IS-mean; HR, 3.4; 95% CI: 1.1-10.4 for IS-bin; and HR, 2.2; 95% CI: 1.2-4.2 for IS-max). This association was maintained in multivariable proportional hazards analysis. Conclusions: The severity of microscopic inflammation over time is an independent risk factor for developing advanced colorectal neoplasia among patients with long-standing UC.

Original languageEnglish (US)
Pages (from-to)1099-1105
Number of pages7
JournalGastroenterology
Volume133
Issue number4
DOIs
StatePublished - Oct 2007
Externally publishedYes

ASJC Scopus subject areas

  • Hepatology
  • Gastroenterology

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