Insulin resistant rats induced by fructose were treated with rosiglitazone (RSG), and the effect of RSG on the endocrine function of vascular endothelial cells were investigated. The results showed that RSG can improve the endocrine function of endothelia by enhancing aortic NO synthase activity and the ability of anti-oxidative stress.

Objective:To explore the strategies and complications of the submucosal tunneling endoscopic resection (STER) in the treatment of esophageal duplicated cyst (EDC).Methods:From January 2013 to December 2019, at Department of Gastroenterology, Taizhou Hospital of Zhejiang Province, the clinical data of 11 hospitalized patients with EDC diagnosed by pathological examination who underwent STER were collected. The clinical featured, computed tomography (CT) findings, endoscopic findings, postoperative efficacy, complications and pathological results after operation were summarized.Results:Among the 11 patients, there were 6 males and 5 females, the age ranged from 13 to 67 years, and the mean age was (43.0±18.2) years. One case presented with swallowing obstruction, 1 case with belching, 4 cases with upper abdominal pain, and the remaining 5 cases had no specific clinical symptoms. Under endoscopy, the lesions of 11 patients were hemispherical or mound-shaped with smooth surface submucosal masses in the esophageal cavity, which were soft to touch. Under endoscopic ultrasonography, they all appeared as hypoechoic masses with clear boundary located in the esophageal muscularis propria. The results of CT scan of 9 patients showed round low-density cystic masses, among them 7 cases showed mild enhancement. The maximum diameter of the cysts was 1.5 to 4.4 cm, with mean maximum diameter being (2.8±0.8) cm, and the maximum diameter of most patients (7 cases) were 2 to 3 cm. The other two patients showed only slightly thickened esophageal wall on CT. Five lesions occurred in the horizontal mediastinum of the lower esophagus. All the 11 patients underwent STER operation successfully, among them 6 patients received simple STER and the cysts were completely resected, and the other 5 patients received STER and cauterization with argon ion for the residual cyst wall. The pathological results after operation indicated that 6 cases were congenital esophageal cysts and 5 cases were bronchogenic cysts. The median follow-up time (range) of 11 patients was 42 months (12-86 months). Ten patients recovered well after the operation, and local recurrence, malignant transformation or metastasis were not found. One case had recurrence, and was treated with STER and cauterization with argon ion for residual cyst wall and cured. No complications such as bleeding, fistula, mediastinal infection or death occurred during and after operation in all the 11 patients.Conclusions:STER is a minimally invasive, safe and effective treatment for EDC, and may be a new treatment for EDC.

Objective To evaluate the safety and effectiveness of three endoscopic methods for re-moval of common bile duct stones (CBDs)accompanied with periampullary diverticula(PAD).Methods A total of 154 patients hospitalized at Taizhou Hospital and Taizhou No.1 People′s Hospital of Zhejiang prov-ince from December 2012 to July 2013 were divided randomly into three groups,i.e.,EST,EPBD and ES-BD group,and received the treatment of EST,EPBD and limited EST plus EPBD (ESBD)to extract CBDs, respectively.After 12 months of follow-up,the rate of full stone clearance,stones clearance rate in one time,the rate of mechanical lithotripsy,the rate of urgent lithotripsy,the average procedures,the average removal time and the complication incidence among three groups were compared.Results The rates of stone clearance in one time in group ESBD was higher than those of group EST and group EPBD (94.12% VS 78.43%,73.08%;P <0.05)with significant difference.The average procedures in group ESBD was lower than that of group EPBD (1.08 VS 1.31,P <0.05),which also showed significant difference.The occur-rence rates of early complication in group ESBD was lower than that of group EPBD (15.69% VS 34.61%, P <0.05).The occurrence rates of post-ERCP hyperamylasemia in group ESBD was lower than that of group EPBD (5.88% VS 21.15%)with significant difference (P <0.05).The incidence of pneumobilia in group EST was higher than those of group EPBD (52.27% VS 26.19%,P =0.013)and group ESBD (52.27%VS 27.66%,P =0.016).Conclusion The stone extraction efficiency of ESBD is better than that of EST and EPBD.Compared with conventional EST,ESBD shows similar safety level,and is safer than EPBD.So ESBD is a safe and effective method to remove CBDs with PAD.

Objective To summarize the endoscopic appearance,endoscopic ultrasound findings and histopathological characteristics of gastric inflammatory fibroid polyp (IFP) in order to improve diagnosis of IFP.Methods From September 2011 to November 2016,49 patients with pathologically comfirmed gastric IFP,who underwent endoscopy in Taizhou Hospital of Zhejiang Province,were enrolled.The medical history,endoscopic examination,treatment and follow-up were retrospectively enalyzed.Results Among 49 patients with gastric IFP (16 males and 33 females;average age 54 years) the maximum diameter of 33 cases (67.3％) was between 1.0 cm and 2.0 cm.Forty-eight cases had single lesion and one case had multiple lesions.The lesions of 17 cases (34.7％) were located at the anterior wall of gastric antrum,the lesions of seven cases (14.3％) were at the posterior wall of gastric antrum,the lesions of seven cases (14.3％) were at the lesser curvature of gastric antrum and the lesions of seven cases (14.3％) were at the great curvature of gastric antrum.Among the lesions of 41 patients who received endoscopic ultrasonography,28 lesions were located in the submucosa of stomach,13 lesions were located in mucosa and muscularis mucosa.The rate of misdiagnosis of endoscopic ultrasonography was 29.3％ (12/41).The endoscopic ultrasound findings of the lesions included 26 hypoechoic structures,11 hyperechoic structures and four slightly hypoechoic structures.The lesions of all the patients were successfully removed by endoscopic polypectomy without any complication.Thirty-seven lesions were treated by endoscopic submucosal dissection (ESD) and 12 lesions by endoscopic mucosal resection (EMR).All the patients were not clearly diagnosed before operation and were finally diagnosed by pathological examination.Postoperative pathological examination showed that in the suhmucosa and mucosa lamina propria,spindle-shaped cells proliferated and arranged in an interwoven pattern or cells around vessels or mucosal glands formed vortex-like or onion skin like pattern.Forty-seven patients were followed up and the median follow-up time was 31 months.All patients survived withont recurrence or metastasis until the submission of this paper.Conclusions The rate of misdiagnosis of gastric IFP is high before operation,and the diagnosis is depended on histopathological examination.Endoscopic resection is the first choice because the diameter of most lesions are less than 5 cm.

Objective To explore the pathologic features and distribution characteristics of upper gastrointestinal submucosal tumors (SMT).Methods From January 2013 to December 2017,at Department of Gastroenterology of Taizhou Hospital Affiliated to Wenzhou Medical University,clinical data of 1 182 hospitalized patients with 1 237 upper gastrointestinal SMT who underwent endoscopic therapy and diagnosed by pathology and immunohistochemistry was retrospectively analyzed including the pathological types,tumor of locations,endoscopic findings,layer of origin and tumor size.Results There were 473 esophageal SMT,including 387(81.8％) leiomyomas,located in the mucosal muscularis or muscularis propria;and 59(12.5％)cysts located in the submucosa or mucosal muscularis.There were 138(29.2％) lesions,159(33.6％) lesions and 176(37.2％) lesions in the upper,middle and lower esophagus respectively,and the most common type was leiomyoma.A total of 723 tumors were gastric SMT,among them 284 (39.3％) lesions were gastrointestinal stromal tumors (GIST) and 273(37.8％) lesions were leiomyomas,and all located in the muscularis propria.A total of 69(9.5％) lesions located at cardia,the common types were leiomyoma (55 lesions,79.7％) and GIST (nine lesions,13.0％).A total of 239 (33.1％) lesions located at gastric fundus,the common types were GIST (152 lesions,63.6％) and leiomyoma (79 lesions,33.1％).A total of 280 (38.7％) lesions located at gastric body,the common types were leiomyoma (138 lesions,49.3％) and GIST (111 lesions,39.6％).A total of 127 (17.6％) lesions located at gastric antrum,the common types were heterotopic pancrease (71 lesions,55.9％) and lipoma (26 lesions,20.5％),and all were located in the submucosa,some involved the muscularis propria.There were six (0.8％) lesions at gastric angle,and two (0.3％) at gastrointestinal anastomosis.Forty-one lesions were duodenal SMT,among them 23(56.1％) located at duodenal bulb,the common types were cyst (10 lesions,43.5％),lipoma (five lesions,21.7％) and heterotopic pancrease (five lesions,21.7％).A total of 18(43.9％) lesions located at descending duodenum,the common types were lipoma (nine lesions,50.0％) and cyst (five lesions,27.8％),and all lesions located in the submucosa.Conclusions The most common type of SMT in the esophagus and cardia is leiomyoma,however the SMT in gastric fundus and body are mostly leiomyomas and GIST,while in gastric antrum,most SMT are heterotopic pancreases and lipomas.In duodenal bulb and descending duodenum,the common types of SMT are cyst and lipoma.