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DOI: 10.1055/a-2686-3672
Internal traction combined with underwater endoscopic submucosal dissection for a rectal neuroendocrine tumor
Authors
Supported by: Science and Technology Innovation Committee of Shenzhen JCYJ2022053015180024
Supported by: Science and Technology Innovation Committee of Shenzhen JCYJ20210324113802006
Underwater endoscopic submucosal dissection (ESD) has the advantages of a clear endoscopic view and easy manipulation by buoyancy in the removal of gastrointestinal tract lesions [1]. In addition, some cases reported that traction combined with underwater ESD improved visual acuity in the removal of early pharyngeal cancer and colorectal sessile serrated adenoma/polyp [2] [3]. Herein, we showed a case with a rectal neuroendocrine tumor (NET), which was successfully removed by internal traction combined with underwater ESD.
A 59-year-old female was diagnosed with a rectal NET during colorectal cancer screening examination ([Fig. 1] a). Endoscopic ultrasonography (EUS) showed a hypoechoic lesion (8.3 mm × 6.6 mm) originating from the submucosa layer ([Fig. 1] b). “Clip coupled with elastic ring” internal traction according to our previous study combining with underwater ESD was performed to resect the rectal NET [4]. The routine procedures involving marking the lesion, submucosal injection, circumferential incision, and clip, coupled with elastic ring internal traction, were performed ([Fig. 1] c–f). Then, dissection was conducted with underwater saline immersion ([Fig. 1] g and [Video 1]). The lesion was successfully removed with en bloc resection, and histopathology demonstrated a neuroendocrine tumor ([Fig. 1] h, i). The defect was closed with endoscopic clips ([Fig. 1] j). The internal traction combined with underwater ESD may overcome the disadvantages of conventional or traction strategies in the treatment of rectal NET, such as poor visual field, deep thermal injury, and iatrogenic perforation risk. Moreover, this simple method may facilitate a constant endoscopic view and smooth continuation during the procedure; however, further studies are needed.


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Conflict of Interest
The authors declare that they have no conflict of interest.
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References
- 1 Kong C, Huang L, Yang M. et al. Engineering the microbiome: A novel frontier in inflammatory bowel disease treatment. Chin Med J (Engl) 2025;
- 2 Huang S, Tan L, Liao S. et al. Underwater endoscopic submucosal dissection with dental floss traction for the treatment of early pharyngeal cancer. Endoscopy 2023; 55: E1184-E1185
- 3 Pinard F, Jacques J, Grainville T. et al. Multipolar traction pulley method combined with underwater endoscopic submucosal dissection for a large rectal laterally spreading tumor. Endoscopy 2024; 56: E96-E97
- 4 Li H, Shi RY, Yao J. et al. “Clip coupled with an elastic ring” internal traction for endoscopic submucosal dissection of a rectal neuroendocrine tumor: a junior endoscopist experience. Rev Esp Enferm Dig 2024; 116: 164-165
Correspondence
Publication History
Article published online:
11 September 2025
© 2025. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/).
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References
- 1 Kong C, Huang L, Yang M. et al. Engineering the microbiome: A novel frontier in inflammatory bowel disease treatment. Chin Med J (Engl) 2025;
- 2 Huang S, Tan L, Liao S. et al. Underwater endoscopic submucosal dissection with dental floss traction for the treatment of early pharyngeal cancer. Endoscopy 2023; 55: E1184-E1185
- 3 Pinard F, Jacques J, Grainville T. et al. Multipolar traction pulley method combined with underwater endoscopic submucosal dissection for a large rectal laterally spreading tumor. Endoscopy 2024; 56: E96-E97
- 4 Li H, Shi RY, Yao J. et al. “Clip coupled with an elastic ring” internal traction for endoscopic submucosal dissection of a rectal neuroendocrine tumor: a junior endoscopist experience. Rev Esp Enferm Dig 2024; 116: 164-165

