8 Median procedure time, min 57 ± 42   Histology type     Low grade intraepithelial neoplasm (LGIN) 108 Selleck Akt inhibitor 50.2 High grade intraepithelial neoplasm (HGIN) 68 31.6 ECG depth of invasion     Mucosa (M) 29 13.5 Submucosa (SM) 10 4.7 Complication     bleeding 3 1.4 perferation 0 0 recurrence 6 3.0 Presenting Author: WEN LI Additional Authors: ZIKAI WANG, YUNSHENG WANG, XIULI ZHANG, QURRATULAIN HYDER, GANG SUN, LILI WU, PING TANG Corresponding Author: WEN LI Affiliations: Department of Gastroenterology and Hepatology, Chinese PLA General Hospital Objective: It remains unclear whether a small-sized endoscope

is superior to a big one for natural orifice transluminal endoscopic surgery (NOTES); and it is controversial whether NOTES is in general less invasive than laparoscopy. This study was designed to evaluate the reliability, efficacy and systematic impact of two different sized endoscopes for NOTES peritoneoscopy as compared to conventional laparoscopy. Methods: Fifteen dogs were randomly assigned to 3 groups, small-sized endoscope (SS) group, big-sized endoscope (BS) group and standard laparoscopy (SL) group. All animals underwent peritoneoscopy. Blood samples were collected

at 1 h preoperatively and 1 h, 12 h, 2 d, 7 d postoperatively. Serum TNF-α and IL-6, and peripheral white blood cell (WBC) counts were analyzed. Body weight, operation time, closing time of the gastrostomy, histopathologic examination of the gastric incision, visualization scores of the abdominal organs and complications were also recorded. Results: Peritoneoscopies were successfully performed by both NOTES and laparoscopic route. Less time was spent to complete Palbociclib mouse the whole procedure on the SL group than the SS and BS groups (P < 0.01), but no significant difference was found between SS and BS group (P > 0.05). The gastric incision had satisfactory

healing both in SS and BS groups. Changes of body weight and visualization scores were similar among the three groups (P > 0.05). There were no significant difference of serum TNF-α, IL-6 levels and WBC counts at each time point among SS, BS and SL groups (P > 0.05). Besides the postoperative adhesions, there were no other intra-operative and post-operative complications in all three groups. Conclusion: A small-sized endoscope is not superior to a big one selleckchem for transgastric NOTES peritoneoscopy. Transgastric NOTES procedure is not less invasive than laparoscopy in terms of inflammatory response; and NOTES is more time consuming compared to conventional laparoscopy. Key Word(s): 1. NOTES; 2. Laparoscopy; 3. Size of endoscope; 4. Inflammatory; Presenting Author: HANG YI Additional Authors: BING HU, CHENGWEI TANG Corresponding Author: HANG YI Affiliations: West China Hospital, Sichuan University Objective: To evaluate the therapeutic effects of multi-band mucosectomy and endoscopic submucosal dissection in the treatment of early esophageal cancer and precancerous lesions.