Objective To summarize the imaging manifestation and identification of ectopic pancreas (EP), so as to improve clinicians and radiologists’ knowledge of EP and aid in accurate preoperative diagnosis, thereby reducing the misdiagnosis rate and avoiding unnecessary surgery. Methods Combined with clinical experience and relevant literatures in recent years, the histopathology, common imaging manifestations and main differential diagnosis of ectopic pancreas were summarized. Results EP is a rare congenital developmental anomaly of pancreas, the most common location is the upper digestive system. At present, the commonly used imaging technology is computed tomography. The imaging findings of ectopic pancreas were similar to those of normal pancreas, and its density and enhancement characteristics were related to its histopathological composition. The specific signs of ectopic pancreas include “central umbilical sign” “ductal structure” and “flat/adherent sign”. Heterotopic pancreas should be differentiated from submucosal tumor of gastrointestinal tract. Conclusions The imaging findings of EP have certain characteristics. For some cases with atypical imaging findings, imaging diagnosis is difficult.
ObjectiveTo summarize the status and progress of imaging studies of pancreatic neuroendocrine neoplasms (pNENs).MethodThe relevant literatures published recently at domestic and abroad about the imaging of pNENs were collected and reviewed.ResultsDue to poor visibility of pancreatic body and tail, the application of ultrasound (US) was limited. Compared with US, endoscopic ultrasound (EUS) and contrast-enhanced ultrasound (CEUS) could improve the detection rate of pNENs. The ability of plain CT scans to differentiate pathological grades was still controversial, but the value of enhanced scan was higher. CT texture analysis was feasible in the discrimination of nonhypervascular pNENs and pancreatic ductal adenocarcinoma (PDAC). Teta2 was the parameter with the highest diagnostic performance. The enhanced features of MRI were similar to CT. Combined with the apparent diffusion coefficient (ADC) value, the diagnostic and classification capabilities of MRI were improved, and the sensitivity and specificity of different ADC thresholds were also different. 68Ga-tetraazacyclododecane tetraacetic acid (68Ga-DOTA) peptide PET-CT had good preliminary diagnostic value for well-differentiated pNENs, and 18Fluoro-fluorodeoxyglucose (18F-FDG) PET-CT had limited diagnostic value.ConclusionsSomatostatin receptor imaging is of high diagnostic value and can guide clinical treatment and predict prognosis, but it has not been widely used in China. Conventional morphological images have advantages in the diagnosis and classification of pNENs. Therefore, it is important to choose a proper image inspection method.
Objective To study the clinical significance of central pancreatectomy in treatment of benign tumor of neck and body of pancreas. Methods The clinical data of 29 patients with benign tumor of pancreas were reviewed retrospectively in our hospital during the past 5 years. Results There was no perioperative death. Mean of operative time was （165±45） min （125-270min）， mean of blood loss was （173±88） mL （50-450mL）. The pathological diagnosis of all the patients were benign. Pancreatic fistula occurred in 10 patients. One patient with bleeding after operation was treated with another two operations. Twenty-one patients were followed-up with the time ranged from 3 months to 4 years （average 16 months）. There were no complications related to diabetes. Conclusion Central pancreatectomy is reasonable for patients with benign tumor of pancreas， it could well preserve the endocrine and exocrine function of pancreas， and improve the quality of life of patients.
Objective To evaluate the long-term efficacy of extended and standard surgery for carcinoma of head of pancreas by using meta-analysis. Methods Related articls （1990-2012） were searched in Pubmed， WOS， Embase， WanFang， SinoMed， and CNKI. Study on quality of these literatures were evaluated by using the Jadad score. The patients with pancreatic head carcinoma underwent extended radical resection and standard radical resection were classified to treatment group and control group， respectively. The mortality， morbidity， and survival rates of 1-， 3-， and 5-year after operation in the two groups were evaluated by using meta-analysis. Results A total of 11 studies fitted the selection crit-eria， including 744 patients. Among them 357 cases were in standard radical resection group and 387 cases in the extended radical resection group. The results of meta-analysis showed that： ①The morbidity after operation did not significantly differed between the extended radical resection group and standard radical resection group （OR=1.360， 95% CI=0.990-1.870， P=0.050）. ②The mortality of the two groups did not significantly differed （OR=0.870， 95% CI=0.430-1.760，P=0.700）. ③There were no significant differences in survival rates of 1-， 3-， and 5-year between the two groups （OR=0.880， 95% CI=0.450-1.720， P=0.710；OR=0.940， 95% CI=0.590-1.480，P=0.710；OR=1.000， 95% CI=0.600-1.67， P=1.000）. Conclusion Compared with standard radical resection， extended radical resection can not improve the survival rates of 1-， 3-， and 5-year after operation， and can’t reduce the mortality and morbidity after operation
ObjectiveTo do a brief introduction and prospects for simultaneous pancreas and kidney transplanta-tion from aspects of recipient screening, choice of operative method, prognosis, quality of life, and complications. MethodDomestic and international literatures were collected to summary the effect, prognosis, and the latest progress of simultaneous pancreas and kidney transplantation in the treatment of diabetes. ResultsAs a kind of mature treatment of diabetic with end-stage renal disease, simultaneous pancreas and kidney transplantation had been carried out in most transplantation centers around the world, it had the definite therapeutic effect and controllable side effects, the life quality of posttransplantation patients would be improved notably. However, the screen of transplantation patient, the selection of transplantation operation, and the postoperative immunosuppressive protocols had not yet been reached a consensus. ConclusionsSimultaneous pancreas and kidney transplantation is the most effective treatment for type 1 diabetes patients with end-stage renal disease, it provides a more feasible and more physiological way for the secretion of insulin. Although the patient has to undergo a major operation and take some risk, simultaneous pancreas and kidney transplantation still improves the patient's survival rate and the quality of life, and reduces the incidence of complications related to diabetes. Based on the above reasons, simultaneous pancreas and kidney transplantation should be a preferred treatment for all eligible patients.
ObjectiveTo compare surgical safety and postoperative efficacy of total mesopancreas excision (TMpE) with pancreaticoduodenectomy (PD) and standard PD (Whipple).MethodsA total of 123 patients underwent PD in the Affiliated Hospital of Southwest Medical University from August 2013 to December 2017 were included, including 47 patients with pancreatic head carcinoma and 76 patients with periampullary carcinoma, then were divided into a TMpE group and a Whipple group respectively. The operative time, intraoperative blood loss, postoperative hospitalization time, postoperative recovery time of gastrointestinal function, postoperative complications, and postoperative survival of patients with the same site between the Whipple group and the TMpE group were retrospectively compared.Results① There were no significant differences in the baseline data between the TMpE group and the Whipple group in the pancreatic head carcinoma and periampullary carcinoma (P>0.05). ② For the patients with pancreatic head carcinoma, there were no significant differences in the operative time, postoperative hospitalization time, and postoperative gastrointestinal function recovery time between the TMpE group and the Whipple group (P>0.05), but the intraoperative blood loss in the TMpE group was significantly higher than that in the Whipple group (P=0.038); For the patients with periampullary carcinoma, the above indexes had no significant differences between the TMpE group and the Whipple group (P>0.05). ③ The total incidence of complications in the TMpE group was significantly higher than that in the Whipple group for the patients with pancreatic head carcinoma (χ2=6.595, P=0.010), which had no significant difference between the TMpE group and the Whipple group for the patients with periampullary carcinoma (P>0.05). ④ The cumulative survival curve in the TMpE group was better than that in the Whipple group for the patients with pancreatic head carcinoma (χ2=9.597, P=0.002), which had no significant difference between the TMpE group and the Whipple group for the patients with periampullary carcinoma (χ2=0.844, P=0.358).ConclusionsFor patients with pancreatic head cancer, comparing with standard Whipple, although TMpE PD increases intraoperative blood loss and overall incidence of complications, it could significantly improve long-term survival and there are no significant differences in postoperative recovery time and operative safety between Whipple and TMpE; For patients with periampullary carcinoma, there are no significant differences in surgical safety, long-term survival rate, and survival time between TMpE and Whipple.
Sixteen cases unresectable carcinoma of the head of the pancreas complicated with jaundice were treated by one stage cholecysto-jejunal and gastro-jejunal loop double anastomosis, the same result of jaundice drainage and prevention of bile reflux were obtained when compared with simple cholecysto-jejunal loop anastomosis, on the other hand, the obstructive symptoms resulting from postoperative cancerous comppression of duodenum and pylorus were avoided as well. The operation is simple with less physiologic disturbance and the patient can lead better postoperative live.
ObjectiveTo summarize the application of magnetic resonance imaging (MRI) in the evaluation of pancreatic exocrine function.MethodIn this paper, we reviewed and summarized the related literatures about the application of MRI in the field of pancreatic exocrine function evaluation in recent years.ResultsA variety of MRI techniques could be used to detect the pancreatic exocrine function. In addition to conventional MRI techniques, there were also MRI stimulated by pancreatic secretions, cine (dynamic) cholangiopancreatography based on space selective reverse recovery pulse, and so on.ConclusionThe new MRI techniques have potential for semi-quantitative and quantitative evaluation of pancreatic exocrine function.
ObjectiveTo analyze and conclude CT and MRI imaging features of ectopic pancreas in gastrointestinal tract so as to improve the understanding of the features.MethodsThe clinical, imaging, and pathological data of 12 patients with ectopic pancreas in the gastrointestinal tract confirmed by the pathology in the Sichuan Provincial People’s Hospital from November 2016 to June 2019 were retrospectively analyzed. The characteristics of image presentation were summarized.Results① The anatomical distribution: all patients had a single lesion. Of the 12 cases, 6 cases located in the gastric body lesser curvature, 3 cases located in the gastric angle, 1 case located in the posterior wall of gastric antrum, 1 case occurred in the upper jejunum, and 1 case occurred in the terminal ileum; 8 cases located in the submucosa, 2 cases located in the submucosa and muscular layer simultaneously, 1 case located in the submucosa, muscular and serous layer simultaneously, and 1 case located in the muscular layer. ② Size of the lesions: the maxium dimensions of the lesions were all 3 cm or less, and the long axes of the lesions were parallel to the gastrointestinal tract wall in 10 cases. ③ The internal characteristics: the results of 9 of 11 cases showed the isodensity compared to main pancreas on the plain CT scan. The results of 8 patients with enhanced CT showed the moderate to obvious enhancement, with 2 cases showed the slightly enhanced flaky or tube-like foci. In the arterial phase and portal venous phase, 6 cases showed the isodensity compared to main pancreas respectively. The result of MRI in 1 patient showed the isointensity compared to main pancreas on the plain scan and obviously heterogeneous enhancement.ConclusionCT and MRI could provide some information about location, size, and internal density or intensity of ectopic pancreas, and could be helpful for diagnosis.
Objective To evaluate the impact of portal or systemic venous pancreas graft drainage on patient and graft outcomes following simultaneous pancreas kidney transplantation (SPK). Methods We searched The Cochrane Library (2008, Issue 1), PubMed (1970 to Feb 2008) and EMBASE (1974 to Feb 2008) to find studies concerning the effect of systemic versus portal venous pancreas graft drainage on patient and graft outcomes. Meta-analyses were conducted using The Cochrane Collaboration’s RevMan 4.2 software. Results Three RCTs involving 401 simultaneous pancreas kidney transplants were included in our meta-analysis. Statistically significant differences were only observed in 3- and 5-year pancreas graft survival rates (P=0.03 and P=0.05). No significant difference was noted in patient or kidney graft survival rates. Conclusion Currently available evidences from RCTs does not support the effectiveness of portal drainage in preventing thrombosis, rejection or infection after SPK. Large-scale, long-term and appropriately designed RCTs are required to conclude whether portal and systemic drainage in pancreas transplantation are equivalent in terms of patient and graft survival.