P-288 - Efficacy of Magnetic Marking Clip Method for Pre-operative Localization of Gastrointestinal Tumor

Date 04 July 2015
Event WorldGI 2015
Session Posters
Topics Gastrointestinal Cancers
Surgical Oncology
Radiation Oncology
Presenter S.H. Kim
Citation Annals of Oncology (2015) 26 (suppl_4): 1-100. 10.1093/annonc/mdv233
Authors S.H. Kim1, H.S. Choi1, H.J. Chun1, I.K. Yoo1, J.M. Lee1, E.S. Kim1, B. Keum1, Y.T. Jeen2, H.S. Lee1, C.D. Kim1
  • 1Korea University College of Medicine, Seoul/KR
  • 2Department of Internal Medicine, Seoul/KR



As laparoscopic surgery has been mainly used to resect gastrointestinal (GI) tumors, the importance of tumor localization has been addressed. Without exact tumor localization, resection of unnecessary excess tissue may be happened or surgeons could not secure enough resection margin. Until now, various methods were suggested for the localization of GI tumor in laparoscopic surgery; however there have been several limitations in these methods. This study aimed to assess efficacy and feasibility of a novel method in tumor localization. This study enrolled 13 patients with gastric submucosal tumor and 12 patients with early colorectal cancer.


We devised magnetic marking clip (MMC) that was silicon coated 10mm sized ring magnet

fixed to endoclip using 3-0 nylon. MMC was applied on the center of lesion during preoperative endoscopy. During

surgery, magnetic body which was hanged with long thread which was inserted through laparoscopic trocar, was

used to find tumor lesion which marked by MMC. We analyzed tumor detection rate, detection time, proximal &

distal margin from lesion and procedure associated complication.


In 13 patients, tumors were located in the stomach and 12 patients in colon. Tumor size ranged

from 12 to 18 mm in stomach and 10 to 18 mm in colon. MMC were successfully detected in 25 of 25 patients

(100%) in laparoscopic surgery. The time required for detection ranged from 10 to 35 sec in stomach and

20 to 85 sec in colon. The resected margin from lesion ranged from 5 to 30 mm in stomach and 40 to 50mm in

colon. None of our patients experienced complications associated with MMC procedure.


MMC method was simple and convenient in tumor localization, and showed excellent

outcomes for accuracy of tumor localization and detection rate. Also, there were no procedure associated

complications. MMC method could help surgeons to easily localize tumor lesion during laparoscopic surgery.

Figure: P-288