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Updated: May 30, 2026
04:08
Evaluation of the Effectiveness of Longitudinal Incision for Endoscopic Submucosal Excavation of Gastric Subepithelial Lesions
Published on: April 28, 2026
Clinical applications of submucosal endoscopy
Kazuki Sumiyama1, Christopher J Gostout
1Department of Endoscopy, The Jikei University School of Medicine, Tokyo, Japan.
Current Opinion in Gastroenterology
|August 17, 2011
Summary
Submucosal endoscopy with mucosal flap (SEMF) offers a new flexible endoscopy approach for diagnostic and therapeutic interventions. Early clinical results show outcomes comparable to surgery with reduced morbidity, validating submucosa as a novel endoscopic working space.
Area of Science:
- Gastroenterology
- Endoscopic Surgery
- Minimally Invasive Procedures
Background:
- Flexible endoscopy is evolving with new techniques.
- Natural orifice translumenal endoscopic surgery (NOTES) requires safe access methods.
- The submucosal layer presents a potential endoscopic working space.
Purpose of the Study:
- To review the development and early clinical experiences of Submucosal Endoscopy with Mucosal Flap (SEMF).
- To evaluate SEMF as a novel approach for diagnostic and therapeutic flexible endoscopy.
- To assess the potential of the submucosa as a working space for endoscopic interventions.
Main Methods:
- Developmental laboratory work and procedural details of SEMF.
- Clinical application of SEMF for diagnostic NOTES procedures, achalasia myotomy, and tumor excision.
- Analysis of early clinical outcomes and procedural safety.
Main Results:
- SEMF has been successfully used for diagnostic NOTES, achalasia myotomy, and submucosal tumor excision.
- Clinical outcomes were equivalent to standard surgery but with significantly reduced morbidity.
- Procedures were performed under conscious sedation in some cases within the endoscopy unit.
Conclusions:
- SEMF provides safe access to the peritoneal cavity for NOTES procedures.
- The submucosal layer can be endoscopically tunneled to create a working space.
- The mucosal flap ensures a sealed entry, minimizing contamination and allowing easy closure.
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