Multichannel intraluminal impedance( MII)is a new technique that monitors comprehensively the function of esophagus and the nature and composition of gastroesophageal reflux, and can be applied for the diagnosis of gastroesophageal reflux disease( GERD),especially suitable for the diagnosis of weakly acidic reflux,non-acid reflux, refractory GERD,and GERD with atypical symptoms. This article reviewed the study on MII and its clinical application in diagnosis of GERD.

Gastric intestinal metaplasia (IM), a common clinical pathological diagnosis, is a premalignant condition of intestinal type gastric cancer. The pathogenesis is still unclear, which links with helicobacter pylori (Hp) infection, bile reflux, nitrite intake, vitamin deficiency and so on. In recent studies, the relevant genes involved with transdifferentiation of gastric epithelium to intestinal epithelium are CDX2, SOX2, PDX1, OCT1, SHH, Runx3, Tff, and so on. Overall, the phenotype shift of gastric intestinal metaplasia is a complex and long process, current treatments targeted to the cause of IM such as Hp infection, bile reflux only can prevent its development, but fail to reverse the clinical process, so further clarification to the pathogenesis is still needed to guide the clinical treatment.

Objective Using ?-cyanoacrylate to establish the orthotopic transplantation tumor model from the subcutaneous model of human hepatocellular carcinomas(HCC)in nude mice. Methods The subcutaneous animal tumor model was established by transplanting BEL-7402 cell into the subcutaneous of nude mice. Then the orthotopic transplantation tumor model was established by injecting the subcutaneous transplanted tumor into liver(indirect orthotopic model). Results Using ?-cyanoacrylate to establish the indirect orthotopic model successfully and the survival rates of the transplantation tumor were 95.8 %. Conclusion It was compared with the traditional methods that the indirect orthotopic transplantation tumor model by using ?-cyanoacrylate to establish is an easy method with high successful rate and easy to spread.

Objective:To explore the clinical appearance,diagnosis method and curative efficacy of one patient with esophageal teratoma complicated with rupture of esophagus in order to raise the awareness of the clinicians for the disease. Methods:The patient with chest pain after eating was admitted to hospital,and upper gastrointestinal radiography,chest CT and endoscopy were taken,which showed rupture of esophagus.Then an emergency thoracic exploration was performed.A too long cleft and much necrosis were identified,so the repair of esophagus was changed into excision and anastomosis. Results: The operation was successful,and the pathological findings showed the rupture of esophageal teratoma.Follow-up showed no complication till now.Conclusion:Esophageal teratoma complicated with esophageal rupture is rare.Clinicians should improve the understanding and reduce the misdiagnosis rate.

Objective To investigate the miss rate of adenoma with colonoscopy and assess the features and risk factors for missed diagnosis.Methods Patients with colorectal adenoma received a second colonoscopy within 120 days after adenoma was detected and removed on the initial colonoscopy.The findings of two colonoscopies were reviewed and analyzed.The features of adenoma (including size, location, shape, number and pathology) , clinical characteristics of patients (including age, sex, reasons of colonoscopy, history of diverticular disease, history of abdominal or pelvic surgery and colonoscopy with sedation) and endoscopists were recorded.Miss rate and features of different types of missed adenoma were analyzed.We also assessed the effects of adenoma features, patients' characteristics and endoscopists on missed diagnosis of adenoma.Results Adenoma missed diagnosis was found in 271 patients out of 809 recruited subjects (33% ).A total of 425 adenomas were missed out of 2134 (20% ) adenomas detected by repeated colonoscopy.A large diameter was associated with a decrease in the miss rate for adenoma (P < 0.01).Conversely , sessile or flat shape (P < 0.01) , locations at sigmoid, hepatic flexure, cecum and ascending colonic ( P < 0.05) were significantly associated with a higher miss rate of adenoma, as was the number of adenomas (P <0.01).A higher adenoma missed diagnosis rate was observed in beginner colonoscopists, as compared with experienced ones (P < 0.01).Conclusion A marked miss rate of adenoma exists on colonoscopy, which is significantly associated with the size, shape, location and number of adenomas and endoscopists.

Objective To evaluate the efficacy of different treatment options for cholecysto-choledocholithiasis (CCL),and try to find the ideal treatment.Methods From January 2006 to January 2016,a total of 3 107 patients with CCL from the Affiliated Hospital of Inner Mongolia Medical University were enrolled.Among them,1 283 patients were in open cholecystectomy (OC) and open common bile duct exploration (OCBDE) group,964 patients were in laparoscopic cholecystectomy (LC) and laparoscopic common bile duct exploration (LCBDE) group,and 860 patients were in endoscopic retrograde cholangiopancreatography (ERCP) + LC group.The clinical data of the three groups were analysed.One-way analysis of variance and chi-square test were performed for statistical analysis.Results From 2006 to 2010,the percentage of patients treated with OC + OCBDE,LC + LCBDE,and ERCP + LC were 56.05％ (829/1 479),25.15％ (372/1 479) and 18.80％ (278/1 479),respectively;from 2011 to 2016,the percentage of patients received the above three treatments were 27.89％ (454/1 628),36.36％ (592/1 628) and 35.75％ (582/1 628),respectively.The difference in the proportion of the same treatment at different times was statistically significant (x2 =4.775,4.168 and 0.669,all P ＜ 0.05).The success rate of surgery in the OC + OCBDE group was 100.00％ (1 370/1 370);while the success rate of surgery in the LC + LCBDE group was 94.26％ (920/976),and 56 patients converted to OC + OCBDE;the success rate of surgery in the ERCP + LC group was 95.00％ (817/860),and 31 patients converted to OC + OCBDE,and 12 patients to LC + LCBDE.The intraoperative complication in OC + OCBDE,LC + LCBDE and ERCP + LC were 2.85％ (39/1 370),3.48％ (32/920) and 1.22％ (10/817),respectively.The incidence rates of postoperative complication were 4.89％ (67/1 370),5.34％ (50/920) and 5.51％ (45/817),respectively.The incidence rates of intraoperative complication of the ERCP + LC group was lower than that of OC + OCBDE group and LC + LCBDE group,and the differences were statistically significant (x2 =6.203 and 3.001;both P ＜ 0.05).However there was no significant difference in incidence rate of postoperative complications among the three groups (all P ＞ 0.05).The hospital stay of the OC + OCBDE group,the LC + LCBDE group and the ERCP + LC group were (6.7 ± 1.3) days,(5.6 ± 1.2) days and (10.9 ± 1.6) days,respectively,and the differences were statistically significant (F =90.010,P ＜ 0.01).The hospitalization expenses of OC + OCBDE group,LC + LCBDE group and ERCP+LC group were (13 720±1 910) yuan,(18 150±1 490) yuan and (25 830 ± 2 430) yuan,respectively,and the differences were statistically significant (F =302.991,P ＜ 0.01).Conclusion The first choice of patients with CCL is endoscopic minimally invasive treatment and open surgery can be used as a remedial method for endoscopic treatment.