| International Session（Workshop）3(JGES・JSGE・JSGS・JSGCS) |
| Sat. November 4th 14:00 - 16:30 Room 11: Portopia Hotel South Wing Topaz |
Underwater with inject EMR versus conventional EMR for 20 to 30 mm colorectal tumors
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| Yuichiro Hirai1, Naoya Toyoshima1, Yutaka Saito1 | |||
| 1Endoscopy Division, National Cancer Center Hospital | |||
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| Background The application of underwater with inject EMR (UIEMR) for colorectal tumors has not been fully assessed. Although conventional EMR (CEMR) is widely used, low rates of en bloc and R0 resection are known as weaknesses especially in large tumors (≥20 mm). We aimed to evaluate the efficacy and safety of UIEMR for colorectal tumors measuring 20 to 30 mm, in comparison with CEMR. Methods This was a single-center, retrospective study. Consecutive patients who underwent UIEMR or CEMR for 20 to 30 mm, non-pedunculated colorectal tumors (adenocarcinoma/adenoma) from January to December 2022 were evaluated. The tumor characteristics, rates of en bloc resection, R0 resection and adverse event were compared between the two groups. Results We analyzed 49 lesions (UIEMR/ CEMR: 24/25 lesions). The mean preoperative tumor size (23.2 ± 3.7 vs. 22.8 ± 3.1, p = 0.34) and histopathological diagnosis (adenocarcinoma; 79.2 % vs. 64.0 %, p = 0.24) were similar between the two groups. The UIEMR group showed significantly higher rates of en-bloc (87.5% vs. 68.0%, p < 0.05) and R0 resection (79.2% vs. 50.0%, p < 0.05) compared with CEMR group. Adverse event was observed in only one patient among the UIEMR group, who experienced delayed bleeding. Conclusion UIEMR may be useful for achieving higher en bloc and R0 resection for 20 to 30 mm, colorectal tumors compared with CEMR. |
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Index Term 1: EMR Index Term 2: Underwater with inject EMR |
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