Abstract
Purpose
Cancer risk assessment for ulcerative colitis patients by evaluating histological changes through colonoscopy surveillance is still challenging. Thus, additional parameters of high prognostic impact for the development of colitis-associated carcinoma are necessary. This meta-analysis was conducted to clarify the value of aneuploidy as predictor for individual cancer risk compared with current surveillance parameters.
Methods
A systematic web-based search identified studies published in English that addressed the relevance of the ploidy status for individual cancer risk during surveillance in comparison to neoplastic mucosal changes. The resulting data were included into a meta-analysis, and odds ratios (OR) were calculated for aneuploidy or dysplasia or aneuploidy plus dysplasia.
Results
Twelve studies addressing the relevance of aneuploidy compared to dyplasia were comprehensively evaluated and further used for meta-analysis. The meta-analysis revealed that aneuploidy (OR 5.31 [95 % CI 2.03, 13.93]) is an equally effective parameter for cancer risk assessment in ulcerative colitis patients as dysplasia (OR 4.93 [1.61, 15.11]). Strikingly, the combined assessment of dysplasia and aneuploidy is superior compared to applying each parameter alone (OR 8.99 [3.08, 26.26]).
Conclusions
This meta-analysis reveals that aneuploidy is an equally effective parameter for individual cancer risk assessment in ulcerative colitis as the detection of dysplasia. More important, the combined assessment of dysplasia and aneuploidy outperforms the use of each parameter alone. We suggest image cytometry for ploidy assessment to become an additional feature of consensus criteria to individually assess cancer risk in UC.
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Acknowledgments
This study was conducted in connection to the North German Tumor Bank of Colorectal Cancer (ColoNet), generously supported by the German Cancer Aid Foundation (DKH e.V. #108446). Rüdiger Meyer is supported by a Mildred Scheel postdoctoral scholarship of the German Cancer Aid.
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Meyer, R., Freitag-Wolf, S., Blindow, S. et al. Combining aneuploidy and dysplasia for colitis’ cancer risk assessment outperforms current surveillance efficiency: a meta-analysis. Int J Colorectal Dis 32, 171–182 (2017). https://doi.org/10.1007/s00384-016-2684-5
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DOI: https://doi.org/10.1007/s00384-016-2684-5