No perforation occurred during operation. Pathological examination confirmed leiomyoma in 24 cases, Selinexor cost lipomyoma in 8 cases, heterotopic pancreas in 3 cases, gastrointestinal stromal tumor (GIST) in 2 cases, xanthoma in 1 case and submucosal tissue hyperplasia in the rest 4. During a mean follow-up observation of 13.6 months (range: 2–26 months), no tumor recurrence was confirmed. Conclusion: ESE is a safe and effective treatment for gastroesophageal submucosal tumors. It is alternative to surgical therapy with its preservation of the integrity of the stomach and shorter hospital stay. Key Word(s): 1. ESE; 2. Submucosal Tumor; Presenting Author: XUEFENG LU Corresponding Author: XUEFENG

LU Affiliations: Qilu hospital of shandong university Objective: Transparent cap is becoming increasingly desirable for an attachment in endoscopic diagnosis and treatment, including EMR, ESD, assisting the colonoscope into the body, etc. But application in the treatment of duodenal lesions is not widely. In this study, we aimed to investigate its values in the relatively new field. Methods: A total of 135 patients who got duodenal bulb polyps or heterotopic gastric mucosa were retrospectively reviewed. All of them were treated with APC, during which 17 cases using transparent cap while 118 cases without using it. Then analysis the two groups from the following aspects: the exposure of operative areas, the complications and

residual lesions. Before this study, selleck we have developed the following criteria to define the vision clarity. Grade A: clear vision. Grade B: vision is affected. Results: In our transparent cap group, the exposure of operative areas were classified to grade A, B, were 70.6%(12/17), 29.4%(5/17), while in control group, the corresponding numbers belong to grade A, B, were 29.7%(35/118), 70.3% (83 /118), (P < 0.01). Thus transparent cap could reduce complications of perforation and bleeding, which came from eschar shedding because of the repeated endoscope comes and goes. We also find that the

rate of residues re-treatment was 5.9% (1/17), 10.2% (12/118), respectively (P < 0.05). Conclusion: Using transparent cap in the treatment of duodenal bulb lesions is valid, and we hope it can be utilized in wider areas. Key Word(s): 1. Transparent cap; 2. duodenal bulb; Fossariinae Presenting Author: YI-YI HU Additional Authors: YALI ZHANG Corresponding Author: YALI ZHANG Affiliations: Department of Gastroenterology, Nanfang Hospital, Southern Medical University Objective: This study is to evaluate the function of oddi sphincter and gall bladder after ERCP. Methods: We had a retrospective study of 58 patients who had ERCP from January 2006 to December 2012. Results: There are EST large incision group 21 cases (12 males, 9 females). EST medium and small incision group, 20 cases (8 males, 9 females), EBPD 17 cases (11 male and 9 females); Normal subjects group of 20 cases (12 males, 8 females).