Meta-analysis of endoscopic submucosal dissection versus endoscopic mucosal resection for tumors of the gastrointestinal tract

 

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Background and study aims: Endoscopic submucosal dissection (ESD) has been developed to overcome the limitations of endoscopic mucosal resection (EMR). We aimed to compare the outcomes of these two methods.

Methods: Databases, including Pubmed, EMBASE, and The Cochrane Library, were searched to identify studies comparing ESD with EMR for premalignant and malignant lesions of the gastrointestinal tract. In a meta-analysis, primary end points were the en bloc resection rate and the curative resection rate; secondary end points were operation time, and rates of bleeding, perforation, and local recurrence.

Results: 15 nonrandomized studies (seven full-text and eight abstracts) were identified. Meta-analysis showed higher en bloc and curative resection rates (odds ratio [OR] 13.87, 95 %CI 10.12 – 18.99; OR 3.53, 95 %CI 2.57 – 4.84) irrespective of lesion size. Subgroup analysis showed higher en bloc and curative resection rates with ESD for esophageal, gastric, and colorectal neoplasms, and for lesions of size < 10 mm, 10 mm < 20 mm, and > 20 mm. Local recurrence was lower with ESD (OR 0.09, 95 %CI 0.04 – 0.18). But ESD was more time-consuming than EMR (weighted mean difference [WMD] 1.76; 95 %CI 0.60 – 2.92), and showed high procedure-related bleeding and perforation rates (OR 2.20, 95 %CI 1.58 – 3.07; OR 4.09, 95 %CI 2.47 – 6.80).

Conclusions: ESD showed better en bloc and curative resection rates and local recurrence compared with EMR, but was more time-consuming and had higher rates of bleeding and perforation complications. These results need to be confirmed by high quality trials and further studies in the west.

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Feng GaoPhD 

Department of Colorectal and Anal Surgery
First Affiliated Hospital, Guangxi Medical University

Nanning, Guangxi
People’s Republic of China

Fax: +86-771-5356529

Email: doctorgao0771@hotmail.com