Abstract
Background
The risk of metachronous advanced neoplasia after diagnosing serrated polyps in patients with IBD is poorly understood.
Methods
A retrospective multicenter cohort study was conducted between 2010 and 2019 at three tertiary centers in Montreal, Canada. From pathology databases, we identified 1587 consecutive patients with serrated polyps (sessile serrated lesion, traditional serrated adenoma, or serrated epithelial change). We included patients aged 45–74 and excluded patients with polyposis, colorectal cancer, or no follow-up. The primary outcome was the risk of metachronous advanced neoplasia (advanced adenoma, advanced serrated lesion, or colorectal cancer) after index serrated polyp, comparing patients with and without IBD.
Results
477 patients with serrated polyps were eligible (mean age 61 years): 37 with IBD, totaling 45 serrated polyps and 440 without IBD, totaling 586 serrated polyps. The median follow-up was 3.4 years. There was no difference in metachronous advanced neoplasia (HR 0.77, 95% CI 0.32–1.84), metachronous advanced adenoma (HR 0.54, 95% CI 0.11–2.67), and metachronous advanced serrated lesion (HR 0.76, 95% CI 0.26–2.18) risk. When comparing serrated polyps in mucosa involved or uninvolved with IBD, both groups had similar intervals from IBD to serrated polyp diagnosis (p > 0.05), maximal therapies (p > 0.05), mucosal inflammation, inflammatory markers, and fecal calprotectin (p > 0.05).
Conclusion
The risk of metachronous advanced neoplasia after serrated polyp detection was similar in patients with and without IBD. Serrated polyps in IBD occurred independently of inflammation. This helps inform surveillance intervals for patients with IBD diagnosed with serrated polyps.
Graphical Abstract
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Abbreviations
- AA:
-
Advanced adenoma
- ASL:
-
Advanced serrated lesion
- CRC:
-
Colorectal cancer
- ESGE:
-
European Society of Gastrointestinal Endoscopy
- HP:
-
Hyperplastic polyp
- IBD:
-
Inflammatory bowel disease
- MAN:
-
Metachronous advanced neoplasia
- SEC:
-
Serrated epithelial change
- SP:
-
Serrated polyp
- SP-IA:
-
Serrated polyp in an involved area of the colon in IBD
- SP-UA:
-
Serrated polyp in an uninvolved area of the colon in IBD
- SSL:
-
Sessile serrated lesion
- TSA:
-
Traditional serrated adenoma
- USMSTF:
-
United States Multi Society Task Force
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Acknowledgments
The authors thank Dr. Alan Barkun (McGill University), MD, CM, MSc (Clinical Epidemiology), for his significant contribution to the review of this research project. The authors also thank Miguel Chagnon, MSc, statistician, and our research coordinators, Julie Fleury, MSc and Samira Hanin, MSc, for their help in bringing this project to fruition.
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There was no funding for this study.
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Edgard Medawar contributed to Study concept and design; acquisition of data; statistical analysis; drafting of the manuscript; and critical revision of the manuscript for important intellectual content. Roupen Djinbachian contributed to Study concept and design; acquisition of data; and critical revision of the manuscript for important intellectual content. Ioana Popescu Crainic contributed to Acquisition of data and critical revision of the manuscript for important intellectual content. Widad Safih contributed to Acquisition of data and critical revision of the manuscript for important intellectual content. Robert Battat contributed to Study concept and design and critical revision of the manuscript for important intellectual content. Jeffrey McCurdy contributed to Study concept and design and critical revision of the manuscript for important intellectual content. Peter L Lakatos contributed to Study concept and design and critical revision of the manuscript for important intellectual content. Daniel von Renteln contributed to Study concept and design; drafting of the manuscript; critical revision of the manuscript for important intellectual content; and study supervision.
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Edgard Medawar, Roupen Djinbachian, Ioana Popescu Crainic, Widad Safih, Jeffrey McCurdy, Robert Battat, Peter L Lakatos, and Daniel von Renteln have no conflicts of interest relevant to this paper to declare.
Ethical approval
This retrospective chart review study involving human participants was in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This study was approved by the Institutional Review Board of the University of Montreal Hospital Center (approval number #CER 21.193). There was no direct patient involvement given the retrospective nature of this study. Confidentiality of the data collected was maintained through anonymization, data encryption, restricted database access, and adherence to local good clinical practice guidelines.
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Medawar, E., Djinbachian, R., Crainic, I.P. et al. Serrated Polyps in Inflammatory Bowel Disease Indicate a Similar Risk of Metachronous Colorectal Neoplasia as in the General Population. Dig Dis Sci (2024). https://doi.org/10.1007/s10620-024-08456-z
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DOI: https://doi.org/10.1007/s10620-024-08456-z