Interactions between the Exocrine and the Endocrine Pancreas.

The pancreas has two main functions: to produce and secrete digestive enzymes (exocrine function) and to produce hormones that regulate blood glucose and splanchnic secretion (endocrine function). The endocrine and exocrine portions of the pancreas are central regulators in digestion and metabolism, with continuous crosstalk between their deeply interconnected components, which plays a role in disease. Pancreatic neoplasms, inflammation, trauma, and surgery can lead to the development of type 3c diabetes when an insult simultaneously damages both acini and islets, leading to exocrine and endocrine dysfunction. In diabetes mellitus patients, pancreatic exocrine insufficiency is highly prevalent, yet little is known about the associations between diabetes mellitus and pancreatic exocrine function. This review aims to provide an overview of the physiology of the pancreas, summarize the pathophysiology and diagnostic work-up of pancreatic exocrine insufficiency, and explore the relationships between exocrine pancreatic insufficiency and diabetes mellitus.

Endoscopic workup in pancreatic cancer.

Pancreatic cancer is a highly lethal disease with a rising incidence. It is projected to become the second leading cause of cancer-related mortality by 2030. The staging of pancreatic cancer can be broadly categorized into three groups: resectable cancers, locally advanced or borderline resectable cancers, and metastatic cancers. Endoscopy plays a crucial role in the management of pancreatic cancer for the establishment of the diagnosis, for palliation of symptoms due to biliary and/or gastric outlet obstructions, and more recently, for palliative ablation of cancer. The objective of this review is to provide an overview of the endoscopic evaluation and management of patients with pancreatic cancer. It will specifically cover the diagnostic approach utilizing endoscopic ultrasound (EUS), palliative interventions such as endoscopic retrograde cholangiopancreatography (ERCP), and the emerging field of tumor debulking through radiofrequency ablation (RFA).

Intraoperative pancreatoscopy can improve the detection of skip lesions during surgery for intraductal papillary mucinous neoplasia: A pilot study.

OBJECTIVES: Intraoperative pancreatoscopy is a promising procedure that might guide surgical resection for suspected main duct (MD) and mixed type (MT) intraductal papillary mucinous neoplasms (IPMNs). The aim of the present study was to assess the diagnostic yield and clinical impact of intraoperative pancreatoscopy in patients operated on for MD and MT-IPMNs. METHODS: This is a retrospective cohort study. Patients undergoing surgery for suspected MD or MT-IPMN underwent intraoperative pancreatoscopy and frozen section analysis. In all patients who required extended resection due to pancreatoscopic findings, we compared the final histology with the results of the intraoperative frozen section analysis. RESULTS: In total, 46 patients, 48% females, mean age (range) 67 years (45-82 years) underwent intraoperative pancreatoscopy. No mortality or procedure related complications were observed. Pancreatoscopy changed the operative course in 30 patients (65%), leading to extended resections in 20 patients (43%) and to parenchyma sparing procedures in 10 patients (22%). Analyzing the group of patients who underwent extended resections, 7 (35%) displayed lesions that needed further surgical treatment (six high grade dysplasia and one with G1 pancreatic neuroendocrine tumor) and among those 7, just 1 (14%) would have been detected exclusively with histological frozen section analysis of the transection margin. The combination of both pancreatoscopy and frozen section analysis lead to 86% sensitivity and 92% specificity for the detection of pathological tissue in the remnant pancreas. CONCLUSION: Intraoperative pancreatoscopy is a safe and feasible procedure and might allow the detection of skip lesions during surgery for suspect MD-involving IPMNs.

Long-term functional outcomes after replacement of the esophagus in pediatric patients: A systematic literature review.

BACKGROUND: The indications of esophageal replacement (ER) in pediatric patients include long gap esophageal atresia (LGEA), intractable post-corrosive esophageal strictures (PCES), and some rare esophageal diseases. Various conduits and procedures are currently used worldwide with a lack of consensus regarding the ideal substitute to replace the esophagus replacement. The short-term outcomes of these advanced procedures are well known; there are few data available describing long-term functional outcomes of these patients with long life expectancy. OBJECTIVES: The objective of this study is to investigate the long-term functional outcomes of the most widely used techniques for ER in pediatric patients based on a comprehensive literature search covering the last 10years. METHODS: Eligible were all clinical studies reporting outcomes after esophagectomy in pediatric patients, which contained information on at least 3years of follow-up after the operation. The review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A systematic web-based search using MEDLINE, the Cochrane Library and EMBASE databases was performed, reviewing all medical literature published between January 2006 and December 2015. RESULTS: The scientific quality of the data was generally poor, converging toward only 14 full-text articles for the final analysis. The stomach was the preferred organ for esophageal replacement, where the tubulization of the stomach resulted in significant gastroesophageal reflux. Dysphagia symptoms were more seldom reported, but several authors presented growing figures with the length of follow-up. Dumping syndrome and delayed gastric emptying were only scarcely reported upon. Following colonic graft, chronic gastrocolic reflux affects these patients, in the range of 35-70.8%, while 4 studies reported any dysphagia from 2.7% to 50% of the children. Only one study reported the outcome of the use of a long jejunal segment, where presence of symptoms of functional obstruction was mentioned in 46% of cases. Very few if any data were available on a structured assessment of postprandial dumping and disturbed bowel functions. CONCLUSIONS: Available data in pediatric patients, on the long-term functional outcomes after esophageal replacement with a gastric tube, colonic graft or a long jejunal segment, are of poor scientific quality. Although symptoms are frequently reported currently no conclusions can be drawn regarding potential advantages of one graft over another. TYPE OF STUDY: Treatment study, systematic review. LEVEL OF EVIDENCE: IV.

Cattell-Braasch Maneuver Combined with Artery-First Approach for Superior Mesenteric-Portal Vein Resection During Pancreatectomy.

Pancreatectomy associated with superior mesenteric-portal vein (SMPV) resection is currently considered the standard of care for patients with pancreatic tumors involving the major peripancreatic veins. However, a standard approach for resection and reconstruction is not defined yet. The aim of this study is to analyze the feasibility and short-term results of an original Cattell-Braasch artery-first approach (CBAF) for the resection of SMPV during pancreatectomy. Of 144 pancreatectomies with vascular resection undertaken from 2008 to 2013 at Karolinska University Hospital, 45 (31.2 %) were performed combining a Cattell-Braasch maneuver with an artery-first approach (from 2011 to 2013). The mean patient age was 65.2 years. Thirty-seven (82.2 %) patients underwent pancreatoduodenectomy and 8 (17.8 %) total pancreatectomy. Histology showed pancreatic ductal adenocarcinoma in 42 patients (93.3 %). The median length of the resected SMPV segment was 4.6 cm (range 3-7). In all patients, a direct end-to-end anastomosis was performed without graft interposition. In nine cases (20 %), an arterial resection was also performed. There was no mortality in this series, and the morbidity rate was 35.5 %. Combined CBAF for the resection of SMPV during pancreatectomy seems to be safe and effective. The reconstruction of the resected vessels is possible in many cases without graft interposition, even if the resected vein segment is of considerable length.

Pseudoachalasia: A peculiar case report and review of the literature.

Pseudoachalasia is a rare secondary achalasia, which accounts for only a small subgroup of patients. We describe a 77-year-old woman with recent onset of dysphagia and typical esophageal manometric findings of achalasia. Moreover, esophageal manometric findings of vascular compression at 36 cm from the nose were associated with dysphagia. An upper endoscopy showed the absence of lesions both in the esophagus and gastro-esophageal junction, whilst a 15-mm ulcer on the gastric angulus was detected. The gastric ulcer resulted in being a diffuse signet ring cell carcinoma at histology, suggesting pseudoachalasia. An abdominal computed tomography scan showed an irregular concentric thickening of the gastro-esophageal junction wall extending for 7 cm and a dilated ascending thoracic aorta with no presence of the inferior vena cava, with an enlarged azygos as the source of vascular compression of esophagus. Moreover, cardia involvement from diffuse signet ring cell carcinoma of the gastric angulus was also recognized as the cause of dysphagia. The cancer was not suitable for a surgical approach in an old patient with cardiovascular comorbidities and support therapy was started. In our ambulatory series, pseudoachalasia was eventually diagnosed in 4.7% of 234 consecutive patients with esophageal manometric finding suggestive of achalasia. We also reviewed cases in the literature and aimed to evaluate the reported causes of pseudoachalasia.