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Endoscopy 2010; 42(8): 627-632
DOI: 10.1055/s-0029-1244223
Original article

© Georg Thieme Verlag KG Stuttgart · New York

Chemically assisted submucosal injection facilitates endoscopic submucosal dissection of gastric neoplasms

K.  Sumiyama1 , 2 , H.  Tajiri1 , 3 , C.  J.  Gostout4 , M.  Kawamura1 , 2 , H.  Imazu1 , 2 , T.  R.  Ohya1 , K.  Ikeda1 , K.  Goda1 , S.  Saito1 , T.  Kato1
  • 1Department of Endoscopy, The Jikei University School of Medicine, Tokyo, Japan
  • 2Division of Endoscopy, Kawamura Hospital, Shizuoka, Japan
  • 3Department of Gastroenterology and Hepatology, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
  • 4Developmental Endoscopy Unit, Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
Further Information

Publication History

submitted 22 January 2010

accepted after revision after revision: 15 April 2010

Publication Date:
15 June 2010 (online)

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Background and study aims: A randomized in vivo animal study previously demonstrated that topical injection of mesna solution (sodium-2-mercaptoethanesulfonate) chemically softened submucosal connective tissues and facilitated mechanical dissection of the submucosal tissue plane. The present study evaluated the technical feasibility and safety of chemically assisted endoscopic submucosal dissection (CA-ESD) using mesna in 20 consecutive patients who underwent endoscopic excision of gastric neoplasm.

Materials and methods: Following the margination of the lesion with a mucosal circumcision, 4 – 12 mL of 10 % mesna solution was injected into the submucosal layer. Mechanical submucosal dissection was then performed by bluntly cleaving the chemically treated submucosal layer with the tip of a cap-fitted gastroscope. The use of cautery was restricted to prophylactic hemostasis, dissection of the coagulated vessels and persistent submucosal tissues, and the final snare resection. Post-therapeutic ulceration repair and adverse events were followed up during a 1-week hospitalization and by repeat endoscopies at 1 day, 1 week, and 1 month after the procedure.

Results: Sixteen gastric cancers and four adenomas were treated in this study. The sampled tissue measured 38.25 ± 14.53 mm, with an en bloc resection rate of 100 %. Mean operation time was 21.17 ± 11.6 minutes. The time spent using cautery was limited to 26.1 % of the total submucosal dissection time. Ulcerations healed normally without complications.

Conclusions: This preliminary study demonstrates that submucosal injection of mesna facilitates and expedites mechanical submucosal dissection. The major limitations in this study include the single-arm study design and a small patient population.

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K. SumiyamaMD, PhD 

Department of Endoscopy, The Jikei University School of Medicine

3-25-8 Nishi Shinbashi
Minato-ku
Tokyo 105-8461
Japan

Fax: +81-3-34594524

Email: kaz_sum@jikei.ac.jp