A Retrospective Study of 290 Patients with Resectable Benign and Malignant Gastric Neoplasms to Compare Postoperative Outcomes of Endoscopic Resection with and without the Internal Traction Method Using a Spring-and-Loop with Clip (S-O Clip)

Yoichi Nakatsu; Makoto Furihata; Anna Fujiyama; Arisa Yuzawa; Mako Ushio; Shintaro Yano; Hiroki Okawa; Kumiko Noda; Shinjiro Nishi; Shingo Ogiwara; Tsuneo Kitamura; Naoto Sakamoto; Taro Osada

doi:10.12659/MSM.945341

22 August 2024 : Database Analysis

A Retrospective Study of 290 Patients with Resectable Benign and Malignant Gastric Neoplasms to Compare Postoperative Outcomes of Endoscopic Resection with and without the Internal Traction Method Using a Spring-and-Loop with Clip (S-O Clip)

Yoichi Nakatsu^1ABCDEF, Makoto Furihata^1ABCDEF*, Anna Fujiyama^1F, Arisa Yuzawa^1F, Mako Ushio^1F, Shintaro Yano^1B, Hiroki Okawa^1B, Kumiko Noda^1B, Shinjiro Nishi^1B, Shingo Ogiwara^1D, Tsuneo Kitamura^1D, Naoto Sakamoto^12ACDE, Taro Osada^1ABCDE

DOI: 10.12659/MSM.945341

Med Sci Monit 2024; 30:e945341

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Introduction Material and Methods Results S-O clip Device-Related Adverse Events Discussion Conclusions References

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Table 2 Histological outcomes of ESD with or without the S-O clip before PSM.

		S-O group (n=141)	Control group (n=149)	P value
Tumor size (mm)		15.1±9.3	14.7±0.1	0.766
Specimen size (mm)		33.1±11.3	29.7±11.0	0.005^*
Area of specimens (mm)		991.9±732.9	778.5±689.2	0.0004^*
Histological type (%)	Adenoma	2.8 (n=4)	0.7 (n=1)	0.620
	Differentiated	92.9 (n=131)	95.3 (n=142)
	Undifferentiated	4.3 (n=6)	4.0 (n=6)
Macroscopic type (%)	Elevated	54.6 (n=77)	49.0 (n=73)	0.338
Macroscopic type (%)	Flat or depressed	45.4 (n=64)	51.0 (n=76)	0.338
Tumor depth (%)	M	85.8 (n=121)	92.6 (n=138)	0.168
	SM1	7.1 (n=10)	3.4 (n=5)
	SM2	7.1 (n=10)	4.0 (n=6)
En block resection rate (%)		98.6 (n=139)	97.3 (n=145)	0.449
Complete resection rate (%)		97.9 (n=138)	92.6 (n=138)	0.037^*
Data are shown a mean±standard deviation. ESD – endoscopic submucosal dissection; PSM – propensity score matching; M – tumor invasion in situ; SM – tumor confined to the submucosa. SM is subclassified as SM1 (tumor invasion is within 0.5 mm of the muscularis mucosae) or SM2 (tumor invasion is 0.5 mm or more deep into the muscularis mucosae). ^* value

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A Retrospective Study of 290 Patients with Resectable Benign and Malignant Gastric Neoplasms to Compare Postoperative Outcomes of Endoscopic Resection with and without the Internal Traction Method Using a Spring-and-Loop with Clip (S-O Clip)

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