Ippei Matsuzaki1, Masashi Hattori2, Hiroki Yamauchi1, Naoya Goto1, Yuji Iwata1, Takio Yokoi3, Mafu Tsunemi4, Makoto Kobayashi5, Takeshi Yamamura6, Ryoji Miyahara7. 1. Department of Gastroenterology, Yamashita Hospital, 1-3-5 Nakamachi, Ichinomiya, Aichi, 491-8531, Japan. 2. Department of Gastroenterology, Yamashita Hospital, 1-3-5 Nakamachi, Ichinomiya, Aichi, 491-8531, Japan. m.hattori@yamashita.or.jp. 3. Department of Pathology, Yamashita Hospital, Ichinomiya, Japan. 4. Department of Nursing, Yamashita Hospital, Ichinomiya, Japan. 5. Department of Gastroenterology, Yokkaichi Municipal Hospital, Yokkaichi, Japan. 6. Department of Endoscopy, Nagoya University Hospital, Nagoya, Japan. 7. Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Abstract
BACKGROUND: The feasibility of magnetic anchor-guided endoscopic submucosal dissection (MAG-ESD) using a neodymium magnet for colorectal tumors has not been evaluated. The aim of this study was to clarify the feasibility of MAG-ESD for colorectal tumors. METHODS: This prospective trial was conducted at Yamashita Hospital. MAG-ESD was performed for 49 colorectal tumors. The magnetic anchor comprised an internal magnet attached to an endoclip with 3-0 silk. Both external and internal magnets were made using neodymium magnets. The feasibility of traction achieved using MAG-ESD, en bloc resection rate, complete en bloc resection rate, time required for preparation and attachment of the magnetic anchor, procedure time, rate of retrieval of magnetic anchors, and adverse events were evaluated. RESULTS: MAG-ESDs were successfully performed for 48 colorectal tumors except for a rectal case in which the internal magnet stuck to the endoscope. En bloc resections and complete en bloc resections were achieved in all cases. Attaching the magnetic anchor required a median of 8 min (range 3-37 min). Median procedure time was 76 min (range 28-283 min) and the magnetic anchors were retrieved in all cases without adverse events. CONCLUSION: MAG-ESD is feasible and safe in the colon and may facilitate the treatment of all difficult lesions. (UMIN000024100).
BACKGROUND: The feasibility of magnetic anchor-guided endoscopic submucosal dissection (MAG-ESD) using a neodymium magnet for colorectal tumors has not been evaluated. The aim of this study was to clarify the feasibility of MAG-ESD for colorectal tumors. METHODS: This prospective trial was conducted at Yamashita Hospital. MAG-ESD was performed for 49 colorectal tumors. The magnetic anchor comprised an internal magnet attached to an endoclip with 3-0 silk. Both external and internal magnets were made using neodymium magnets. The feasibility of traction achieved using MAG-ESD, en bloc resection rate, complete en bloc resection rate, time required for preparation and attachment of the magnetic anchor, procedure time, rate of retrieval of magnetic anchors, and adverse events were evaluated. RESULTS: MAG-ESDs were successfully performed for 48 colorectal tumors except for a rectal case in which the internal magnet stuck to the endoscope. En bloc resections and complete en bloc resections were achieved in all cases. Attaching the magnetic anchor required a median of 8 min (range 3-37 min). Median procedure time was 76 min (range 28-283 min) and the magnetic anchors were retrieved in all cases without adverse events. CONCLUSION: MAG-ESD is feasible and safe in the colon and may facilitate the treatment of all difficult lesions. (UMIN000024100).
Entities:
Keywords:
Endoscopic submucosal dissection; MAG-ESD; Magnetic anchor-guided endoscopic submucosal dissection
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