AI Article Synopsis
- Tip-in endoscopic mucosal resection (EMR) is effective for removing large colorectal neoplasms, but the capabilities of non-experts in performing this technique had not been studied prior to this research.
- A study involving 597 colorectal neoplasms revealed that, while non-experts initially had lower success rates for en bloc and R0 resections, their performance improved with more experience, particularly after completing over 10 cases.
- Factors hindering successful en bloc resections included non-polypoid lesion shapes, underlying folds in the lesions, non-lifting signs, and non-expert status with limited experience, yet the study concluded that overall outcomes by non-experts were still favorable.
Article Abstract
Background And Aim: Tip-in endoscopic mucosal resection (EMR) has a high en bloc resection rate for large colorectal neoplasms. However, non-experts' performance in Tip-in EMR has not been investigated. We investigated whether Tip-in EMR can be achieved effectively and safely even by non-experts.
Methods: This retrospective study included consecutive patients who underwent Tip-in EMR for 15-25 mm colorectal nonpedunculated neoplasms at a Japanese tertiary cancer center between January 2014 and December 2020. Baseline characteristics, treatment outcomes, learning curve of non-experts, and risk factors of failing self-achieved en bloc resection were analyzed.
Results: A total of 597 lesions were analyzed (438 by experts and 159 by non-experts). The self-achieved en bloc resection (69.8% vs 88.6%, P < 0.001) and self-achieved R0 resection (58.3% vs 76.5%, P < 0.001) rates were significantly lower in non-experts with <10 cases of experience than in experts, but not in non-experts with >10 cases. Adverse event (P = 0.165) and local recurrence (P = 0.892) rates were not significantly different between experts and non-experts. Risk factors of failing self-achieved en bloc resection were non-polypoid morphology (OR 3.4, 95% CI 1.6-7.3, P = 0.001), lesions with an underlying semilunar fold (OR 3.6, 95% CI 1.6-7.3, P < 0.001), positive non-lifting sign (OR 3.1, 95% CI 1.2-8.0, P = 0.023), and non-experts with an experience of ≤10 cases (OR 3.6, 95% CI 2.1-6.3, P < 0.001).
Conclusion: The clinical outcomes of Tip-in EMR for 15-25 mm lesions performed by non-experts were favorable.
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| http://dx.doi.org/10.1111/jgh.16575 | DOI Listing |
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