We aimed to evaluate the detection rate of AOV and the difference in inspection quality between 2 endoscopists (expert vs. trainee) Methods: We conducted forward-viewing EGD from May to September in 2012. The examiners consisted

of one expert endoscopist and one trainee. We divided patients into five groups according to the inspection level for AOV; Group 1: fully visible, Group 2: partially visible – only upper part, Group 3: partially visible – only lower part, Group4: partially visible – peri-papilla orifice, Group 5: invisible Results: A total of 364 EGD were performed, of which 169 patients were examined by expert, and 195 patients were examined by trainee (Mean age: 56.15 ± 12.42, F : M 127:237). There was significant difference in the length of inserted endoscope for the inspection of AOV selleck between two examiners (68.83 ± 5.73 cm vs. 71.43 ± 8.32 cm, p = 0.001). Expert achieved higher rate of full inspection for AOV (group1) (66.9% vs. 35.9%, p < 0.001). While group 5 (AOV was not seen) was significantly higher in trainee (4.7% vs. 18.5%, p < 0.001) despite entering descending

part of the duodenum. Expert diagnosed papillitis in 3 patients and performed biopsies for the suspicion of major duodenal papilla adenoma in 2 patients. Trainee diagnosed papillitis in 1 patient Conclusion: We could hardly find Neratinib significant lesions in descending part of the duodenum. However, considering medchemexpress significant differences in the inspection level of AOV and length of the inserted endoscope according to the proficiency of endoscopist, endoscopic trainee need to give an effort to shorten the endoscope for the effective inspection of AOV Key Word(s): 1. Ampulla of Vater; 2. esophagogastroduodenoscope Presenting Author: SHO SUZUKI Additional Authors: TADASHI MIIKE, TAKAHO NODA, YUKO NODA, UEHARA NATSUMI, SACHIKO TAKEDA, MAI SAKAGUCHI, SHUICHIRO NATSUDA, KANNA HASHIMOTO, KOUSUKE MAEMURA, TAKUMI YAMAJI, HIROO ABE,

SHOJIRO YAMAMOTO, KENJI YORITA, HIROAKI KATAOKA, KAZUYA SHIMODA Corresponding Author: SHO SUZUKI Affiliations: University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki, University of Miyazaki Objective: Clinically, we found a discrepancy between the preoperative pathological diagnosis of gastric neoplasia from biopsy and postoperative diagnosis from the endoscopic submucosal dissection (ESD). We examined ESD cases of gastric neoplasia at the University of Miyazaki Hospital.