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Factors influencing endoscopic estimation of colon polyp size in a colon model
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Koen Robert Beukema, Jaimy A. Simmering, Marjolein Brusse-Keizer, Sneha John, Rutger Quispel, Peter B. Mensink
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Clin Endosc 2022;55(4):540-548. Published online July 28, 2022
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DOI: https://doi.org/10.5946/ce.2022.017
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 Abstract
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- Background
/Aims: Colorectal polyps are removed to prevent progression to colorectal cancer. Polyp size is an important factor for risk stratification of malignant transformation. Endoscopic size estimation correlates poorly with pathological reports and several factors have been suggested to influence size estimation. We aimed to gain insight into the factors influencing endoscopic polyp size estimation.
Methods
Images of polyps in an artificial model were obtained at 1, 3, and 5 cm from the colonoscope’s tip. Participants were asked to estimate the diameter and volume of each polyp.
Results
Fifteen endoscopists from three large-volume centers participated in this study. With an intraclass correlation coefficient of 0.66 (95% confidence interval [CI], 0.62–0.71) for diameter and 0.56 (95% CI, 0.50–0.62) for volume. Polyp size estimated at 3 cm from the colonoscope’s tip yielded the best results. A lower distance between the tip and the polyp was associated with a larger estimated polyp size.
Conclusions
Correct endoscopic estimation of polyp size remains challenging. This finding can affect size estimation skills and future training programs for endoscopists.
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Citations
Citations to this article as recorded by  - Usefulness and Educational Benefit of a Virtual Scale Endoscope in Measuring Colorectal Polyp Size
Yudai Takehara, Ken Yamashita, Shin Morimoto, Fumiaki Tanino, Noriko Yamamoto, Yuki Kamigaichi, Hidenori Tanaka, Hidehiko Takigawa, Ryo Yuge, Yuji Urabe, Shiro Oka
Digestion.2024; 105(2): 73. CrossRef - Expert endoscopist assessment of colorectal polyp size using virtual scale endoscopy, visual or snare-based estimation: a prospective video-based study
Ioana Popescu Crainic, Roupen Djinbachian, Douglas K. Rex, Alan Barkun, Aasma Shaukat, James East, Cesare Hassan, Yuichi Mori, Heiko Pohl, Amit Rastogi, Prateek Sharma, Joseph C. Anderson, Mahsa Taghiakbari, Edgard Medawar, Daniel von Renteln
Scandinavian Journal of Gastroenterology.2024; 59(5): 608. CrossRef
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