Results: (1) In all types of FBs, food which included

food lump, fish bone, chicken bone shrimp, crab and fruit seeds accounted for 92.9% and 81.1% in rigid and flexible endoscopy group respectively. The size of FBs in flexible group was larger than rigid group (P < 0.05). (2) The proportions of FBs impacted in upper esophagus was higher in rigid group (88.7%) than flexible group (60.8%), but lower in inferior esophagus. (3) The period impacted in esophagus of rigid group (26.2 ± 28.3 hrs) was longer than flexible group (14.4 ± 13.0 hrs)(P = 0.001). (4) 69.7% patients in rigid group and 86.5% in flexible group went to hospital for treatment within 24 hours from impacted. 13.4% in rigid and 1.4% in flexible group went to hospital beyond 48 hours. (5) The proportion of FBs puncturing into one or two esophageal wall PDGFR inhibitor in rigid group (69%) was higher than flexible check details group (31.1%). (6) Positive rate with upper gastrointestinal barium contrast and chest X-ray or abdominal plain film were 98.5%, 23.9% and 94.4%, 22.7% for diagnosing esophageal FBs in rigid and flexible group. (7) The successful rate, complication and perforation rate were 100%, 65.1%, 5.6%

and 97.3%, 47.3%, 1.4% in rigid and flexible endoscopy group, respectively. Conclusion: There was no difference in complication and perforation rate between rigid and flexible endoscopy. The successful rates were both high with two treatment, but flexible endoscopy was more cheaper and no need to aneasthesia. Key Word(s): 1. Esophageal FBs; 2. Foreign body; 3. Endoscopy; 4. Management; Presenting Author: LI SHU Additional Authors: LIN RUI, ZHOU LU, WANG BANGMAO Corresponding Author: LI SHU Affiliations: Tianjin Medical University General Hospital; No. 154, Anshan Road, Heping District, Tianjin Objective: The goal of this study was to investigate the clinical value of narrow-band imaging endoscopy (NBI) and magnification chromoendoscopy (MCE) in diagnosis

of early gastric cancer (EGC) and precancerous lesions. Methods: One hundred and fourteen patients with 上海皓元 137 gastric lesions were enrolled. Routine endoscopy followed by NBI, magnification chromoendoscopy (indigo carmine, IC) was sequentially used. The quality of the gastric lesions, pits and microvascularity were evaluated. The gastric pits and microvascularity were observed and divided into corresponding patterns. The biopsy samples were taken in suspicious area. The values in diagnosis of EGC and precancerous of NBI and MCE were compared. Results: (1)  Visualization of silhouette of gastric lesions by NBI endoscopy and chromoendoscopy were clearer than the conventional endoscopy. There was no significant difference between MCE + NBI and chromoendoscopy MCE + IC. Gastric pit by NBI combined with ME was clearer than MCE and ME. Gastric mucosa microvascularity by NBI combined with ME was clearer than the ME and indigo carmine MCE.