Circulating Vitamin D Level and Its Impact on Mortality and Recurrence in Stage III Colorectal Cancer Patients: A Systematic Review and Meta-Analysis.

BACKGROUND: Vitamin D (VD) has been implicated in several diseases, including colorectal cancer (CRC). This study aimed to determine whether there is an association between VD levels and time-to-outcome in stage III CRC patients through a systematic review and meta-analysis. METHODS: The study adhered to the PRISMA 2020 statement. Articles were searched in PubMed/MEDLINE and Scopus/ELSEVIER. Four articles were selected, with the primary objective of providing a pooled estimate of the risk of death specifically in stage III CRC patients based on pre-operative VD levels. Study heterogeneity and publication bias were analyzed using Tau2 statistics and funnel plots. RESULTS: The selected studies showed significant heterogeneity regarding time-to-outcome, technical assessments, and serum VD concentration measures. The pooled analysis of 2628 and 2024 patients revealed a 38% and 13% increase in the risk of death (HR: 1.38, 95% CI: 0.71-2.71) and recurrence (HR: 1.13; 95% CI: 0.84-1.53), respectively, for random-effects models among patients with lower levels of VD. CONCLUSIONS: Our findings suggest that a low concentration of VD has a significant negative impact on time-to-outcome in stage III CRC.

Novel frontiers of agents for bowel cleansing for colonoscopy.

The incidence of colorectal cancer (CRC) is characterized by rapid declines in the wake of widespread screening. Colonoscopy is the gold standard for CRC screening, but its accuracy is related to high quality of bowel preparation (BP). In this review, we aimed to summarized the current strategy to increase bowel cleansing before colonoscopy. Newly bowel cleansing agents were developed with the same efficacy of previous agent but requiring less amount of liquid to improve patients' acceptability. The role of the diet before colonoscopy was also changed, as well the contribution of educational intervention and the use of adjunctive drugs to improve patients' tolerance and/or quality of BP. The review also described BP in special situations, as lower gastrointestinal bleeding, elderly people, patients with chronic kidney disease, patients with inflammatory bowel disease, patients with congestive heart failure, inpatient, patient with previous bowel resection, pregnant/lactating patients. The review underlined the quality of BP should be described using a validate scale in colonoscopy report and it explored the available scales. Finally, the review explored the possible contribution of bowel cleansing in post-colonoscopy syndrome that can be related by a transient alteration of gut microbiota. Moreover, the study underlined several points needed to further investigations.

Management of Leaks Following Laparoscopic Sleeve Gastrectomy Using Specifically Designed Large Covered Metal Stents.

BACKGROUND: Leaks are the major complication associated with laparoscopic sleeve gastrectomy. OBJECTIVE: The study aimed to assess the efficacy and safety of specifically designed large covered metal stents for the management of post-laparoscopic sleeve gastrectomy leaks. METHODS: Prospectively collected databases from three Italian Endoscopy Units were reviewed. The primary outcome of the study was to evaluate the clinical success of stents placement, defined as complete resolution of clinical and laboratory signs of sepsis with radiological evidence of leak closure. Secondary outcomes were stent-related adverse events and mortality. RESULTS: Twenty-one patients (67% females, mean age 45 years) were included in the study and a total of 26 stents were placed. Technical success of stent placement was achieved in all cases (100%). Clinical success was observed in 85.5% of patients. Stent-related adverse events occurred in 9 patients (43%), with stent migration as the most frequent complication (33%). Adverse events were more frequently observed in patients who had undergone bariatric surgery prior to laparoscopic sleeve gastrectomy compared to patients without previous surgery (83% et al. 27%, p=0.018). CONCLUSION: The placement of specifically designed covered metal stents appears to be an effective and safe therapeutic approach for post-laparoscopic sleeve gastrectomy leaks. Stent migration can be a frequent complication.

Surveillance of neo-squamous epithelium after ablation of Barrett's esophagus: is it better to use jumbo over standard biopsy forceps?

BACKGROUND AND AIMS: As obtaining adequate tissue on biopsy is critical for the detection of residual and recurrent intestinal metaplasia/dysplasia in Barrett's esophagus (BE) patients undergone Barrett's endoscopic eradication therapy (BET), we decided to compare the adequacy of biopsy specimens using jumbo versus standard biopsy forceps. METHODS: This is a two-center study of patients' post-radiofrequency ablation of dysplastic BE. After BET, jumbo (Boston Scientific©, Radial Jaw 4, opening diameter 2.8 mm) or standard (Boston Scientific©, Radial Jaw 4, opening diameter 2.2 mm) biopsy forceps were utilized to obtain surveillance biopsies from the neo-squamous epithelium. Presence of lamina propria and proportion of squamous epithelium with partial or full thickness lamina propria was recorded by two experienced gastrointestinal pathologists who were blinded. Squamous epithelial biopsies that contained at least two-thirds of lamina propria were considered 'adequate'. RESULTS: In a total of 211 biopsies from 55 BE patients, 145 biopsies (29 patients, 18 males, mean age 61 years, interquartile range [IQR] 33-83) were obtained using jumbo forceps and 66 biopsies (26 patients, all males, mean age 65 years, IQR 56-76) using standard forceps biopsies. Comparing jumbo versus standard forceps, the proportion of specimens with any subepithelial lamina propria was 51.7% versus 53%, P = 0.860 and the presence of adequate subepithelial lamina propria was 17.9% versus 9.1%, P = 0.096 respectively. CONCLUSIONS: Use of jumbo forceps does not appear to have added advantage over standard forceps to obtain adequate biopsy specimens from the neo-squamous mucosa post-ablation.

Hem-o-Lok clip migration into the duodenum after laparoscopic digestive surgery: a systematic review.

INTRODUCTION: The wide use of hemoclips during laparoscopic surgery has led to a variety of unusual complications, among these, there is the migration of Hem-o-Lok clip into the duodenum. We performed a literature review of all cases of Hem-o-Lok clip migration into the duodenum after laparoscopic digestive surgery reported in literature. EVIDENCE ACQUISITION: All relevant articles were extracted up to June 2019 based on the results of searches in MEDLINE, PubMed, Scopus, Web of Science and Google Scholar. EVIDENCE SYNTHESIS: At the time of this review, a total of seven cases have been described. The mean age was 49 years and the majority of these patients were women (57%). Previous laparoscopic surgery was performed for cholecystectomy (four patients), cholecystectomy with common bile duct exploration (one patient), right hemicolectomy (one patient) and distal gastrectomy (one patient). Symptoms occurred from 3 months to 2 years after laparoscopic surgery. The majority of patients developed symptoms of bowel occlusion and abdominal pain. Three patients remained asymptomatic. In many cases the Hem-o-Lok wedged into the wall of the first or second portion of the duodenum. In all cases, esophageal gastroduodenoscopy was the primary modality to make the diagnosis. Initial treatment was conservative with watch-and-wait strategy or proton pump inhibitors followed by endoscopic removal, while surgical treatment was required in two cases. CONCLUSIONS: The application of Hem-o-Lok clip during laparoscopic surgery is safe and effective. Postoperative Hem-o-Lok migration into the duodenum is rare. The treatment could be conservative in the majority of cases.

"Wandering spleen" as a rare cause of recurrent abdominal pain: a systematic review.

INTRODUCTION: Wandering spleen (WS) is a rare and generally acquired condition, resulting from abnormal ligamentous laxity failing to fixate the spleen in its normal location in the left upper quadrant, thus leading to its migration to the pelvis due to gravity. Such migration leads to an elongated vascular pedicle, which is prone to torsion causing splenic infarction; thus, a prompt surgical intervention is recommended. Since this adverse event affects childbearing women or children, it is crucial to choose the most appropriate surgical strategy, such as splenectomy or splenopexy, both effective and widely diffused options. The aim of this paper is to perform a literature review on WS reports treated by surgery. We also present a case of symptomatic WS migrated in pelvis in a young female treated by splenectomy. EVIDENCE ACQUISITION: All relevant articles from 1895 up to December 2017 were identified by literature searches in PubMed, Scopus and Google Scholar. EVIDENCE SYNTHESIS: A total of 376 patients treated with surgical approach for WS were identified. The most common presentations were abdominal pain and abdominal mass, and approximately half of the patients had an acute clinical onset. Radiology is essential for the diagnosis. Surgical strategy changed over the time; splenectomy is the most reported treatment although in the last years there is an increasing trend towards a more conservative strategy, preferring splenopexy or a laparoscopic approach. CONCLUSIONS: Surgery is the gold standard strategy, and laparoscopic approach is recommended, for the treatment of wandering spleen. Both splenopexy or splenectomy are effective and safe surgical options.

Elective endoscopic variceal ligation is not a risk factor for bacterial infection in patients with liver cirrhosis.

BACKGROUND: Patients with cirrhosis are at high risk of bacterial infections. Invasive procedures are generally believed to increase this susceptibility. AIMS: We investigated the incidence of bacterial infections in cirrhotic patients undergoing elective endoscopic variceal ligation (EVL). METHODS: We enrolled 60 consecutive cirrhotic patients who underwent a total number of 112 elective EVL procedures. One to seven bands were applied at each session until variceal eradication. Markers of inflammation/infection and blood cultures were obtained before and 24 h after EVL. RESULTS: Aetiology of liver disease was metabolic in 27 (45%), viral in 21 (35%), alcoholic in 12 (20%) patients. Child-Pugh class A/B/C distribution was 29/26/5, respectively, 23 (38%) patients had ascites and 15 (25%) had hepatocellular carcinoma. Blood cultures were negative in all samples before EVL, whereas 3/112 (2.7%) cultures tested positive after endoscopy. Streptococcus mitis and Staphylococcus epidermidis were isolated in 1 and 2 cases, respectively. None of these three patients developed any features of clinically relevant infection, suggesting that the positive cultures were an expression of a transient bacteraemia with no clinical sequelae. CONCLUSIONS: Bacterial infection is an uncommon occurrence after elective EVL in cirrhotic patients, and antibiotic prophylaxis is not necessary in this clinical setting.

Performance of the over-the-scope clip system in the endoscopic closure of iatrogenic gastrointestinal perforations and post-surgical leaks and fistulas.

The increased invasiveness of endoscopic procedures and complex surgical interventions has resulted in an increased number of gastrointestinal iatrogenic defects, such as perforations, leak and fistulas. The conventional treatment for these gastrointestinal defects is surgery, with considerable risks especially in emergency situations and in patients with comorbidities. The Ovesco over-the-scope clip (OTSC) system (Ovesco Endoscopy AG, Tübingen, Germany) and more recently, the Padlock Clip™ (Aponos Medical, Kingston, NH, USA) have shown promising results in the treatment of gastrointestinal defects. Several case reports and case series have demonstrated the efficacy of the OTSC system for the closure of full-thickness defects. Clinical success is best achieved in patients undergoing closure of a perforation or a leak. Closure of fistulas remains a clinical challenge since fibrosis or necrotic and inflamed tissue surrounding lesions may cause clip failure. Over-the-scope clips are a less invasive endoscopic option for managing patients with gastrointestinal defects before a more invasive surgical approach is attempted. Moreover, a failed attempt of OTSC deployment does not preclude subsequent surgical treatment.

Endoscopic ultrasound core needle for diagnosing of solid pancreatic lesions: is rapid on-site evaluation really necessary?

INTRODUCTION: Endoscopic ultrasound (EUS) guided fine needle aspiration (FNA) has a crucial role in the diagnosis of solid pancreatic lesions and rapid on-site evaluation (ROSE) can increase its diagnostic yield. Rapid on-site evaluation is not always available and after EUS-FNA provides a cytology specimen with scant cellularity. Fine needle biopsy (FNB) specimens containing core tissue may theoretically overcome the limitations of EUS-FNA sampling. It could be hypothesized that EUS-FNB without ROSE could achieve the same adequacy and accuracy of EUS-FNB with ROSE. The aim of this review is to evaluate the evidence on the role of ROSE in the setting of EUS-guided tissue acquisition with core needles in patients with solid pancreatic lesions. EVIDENCE ACQUISITION: All relevant articles were extracted up to February 2017 based on the results of searches in PubMed, Scopus and Google Scholar. EVIDENCE SYNTHESIS: A total of 21 pertinent articles were finally included. Among the included studies, 11 were performed without ROSE, 8 with ROSE, and 2 were performed both with and without ROSE. In the ROSE group we found a sensitivity, specificity, overall diagnostic adequacy and overall diagnostic accuracy of 96%, 100%, 86.5%, 85.5%, respectively, while in the no-ROSE group 86.6%, 100%, 89.5%, 86.1% were found, respectively. Mild pancreatitis (mean rates, 3.43%) and abdominal pain (mean rates, 3.6%) were reported as most frequent adverse events. CONCLUSIONS: Endoscopic ultrasound guided-FNB without ROSE offers similar results in terms of adequacy and accuracy as in the presence of an on-site cytopathologist.

Colonic acute malignant obstructions: effectiveness of self-expanding metallic stent as bridge to surgery.

BACKGROUND/AIMS: Bowel obstruction is a frequent event in patients with adenocarcinoma, affecting, in some series, almost one-third of the patients. In the last decades, in addition to surgery, self-expanding metallic stents (SEMSs) are available both as a bridge to surgery (BTS) or palliation. The aim of our study was to demonstrate the safety and efficacy of the use of SEMSs as BTS in selected patients with acute colonic malignant obstructions. MATERIALS AND METHODS: In total, 125 patients with malignant colonic obstruction who underwent emergency surgery or stent insertion were retrospectively enrolled in our study; 62 patients underwent surgery initially, whereas 62 were subjected to stenting as BTS. The 6-month and 1-year survival rates after the procedure (stenting or surgery) and short-term and long-term complication rates were considered as primary endpoints; the recanalization rate after Hartmann's procedure and the length of hospitalization were considered as secondary endpoints. RESULTS: On comparing the surgery group (SG) and the BTS group (BG), we observed a lower short-term complication rate (p<0.05) and a reduction in the mean hospital stay (16.1±7.7 vs. 13.5±3.0, p<0.05) in the latter. No differences in long-term complications were found. The recanalization rate after Hartmann's procedure was higher in BG than in SG, although this was not statistically significant. CONCLUSION: Our experience shows that SEMS insertion is a safe and effective technique in selected patients with colonic malignant obstruction; the reduction in hospital stay and short-term complications in BG is an important cost-saving aim.

Endoscopic management of bile duct injury after hepatobiliary tract surgery: a comprehensive review.

Bile duct injuries (BDIs) are the most serious complications after hepatobiliary surgery and are associated with high morbidity and mortality. The incidence of iatrogenic injuries of bile ducts has increased after the advent of laparoscopic cholecystectomy. BDIs present with biliary leak or biliary obstruction or a combination of both. Successful treatment of these complications requires a multidisciplinary team that includes biliary endoscopists, interventional radiologists and hepatobiliary surgeons. Endoscopic treatment is the main option for biliary leak. Depending on colangiographic appearance of the biliary damage, several endoscopic techniques (naso-biliary drainage, biliary sphincterotomy, placement of prosthesis) are used, allowing to achieve the leak sealing in most cases. In complex biliary fistulas the use of covered self-expandable metal stents is another therapeutic option with high success rates. The most common endoscopic therapy for biliary strictures involves balloon dilation and placement of multiple plastic stents followed by the periodic exchange of the stents. This is usually performed every three months by placing an increasing number of stents each time, until complete resolution of the stricture. Self-expandable metal stents have a larger diameter compared to plastic stents and therefore, higher patency rate. Covered self-expandable stents are an alternative option with the advantage of providing better permeability, preventing occlusion, and reducing the number of the required procedures. The aim of this paper was to review the endoscopic management of patients with bile duct injuries after hepatobiliary surgery.

Pancreatic necrosectomy: an evidence-based systematic review of the levels of evidence and a comparison of endoscopic versus non-endoscopic techniques.

INTRODUCTION: Endoscopic necrosectomy is now becoming common worldwide as a minimally-invasive treatment alternative to surgical necrosectomy. The aims of this systematic review are to record the entire body of the literature accumulated over the past 15 years on endoscopic necrosectomy techniques and to compare the outcomes of endoscopic versus non-endoscopic techniques. EVIDENCE ACQUISITION: All relevant articles were extracted up to December 2015 based on the results of searches in PubMed, Scopus and Google Scholar. EVIDENCE SYNTHESIS: A total of 46 pertinent articles were finally included for the purpose of this systematic review. Most of the studies in our review included small numbers of patients, were retrospective and had low/moderate overall levels of evidence. The mean technical and clinical success rates reported were 99% and 89%, respectively, the mean overall complication rate was 22% and the mean overall mortality rate was 5%. The most common complications were bleeding, which occurred in 11% of patients, perforations/pneumoperitoneum which occurred in 3%, and air embolism in 0.4% of patients. The access to the cavity was created by direct endoscopic puncture in 205 patients, while endoscopic ultrasound guidance was used in 733, with no difference in technical success (99% vs. 99%), clinical success (87% vs. 89%), complications (32% vs. 21%) and mortality (7% vs. 5%) rates. Compared to the percutaneous and surgical therapies, the endoscopic techniques exhibited higher success rates and lower morbidity and mortality rates. CONCLUSIONS: Endoscopic necrosectomy is becoming the standard of care for the treatment of pancreatic necrotic collections.

A Lower Gastrointestinal Bleeding Due to a Post-Traumatic Splenosis: "Wait and See" Represents a Feasible Attitude: A Case Report.

Splenosis represents a benign condition due to an ectopic localization of splenic tissue caused by pathologic or traumatic spleen rupture. Generally, it is asymptomatic and incidentally diagnosed during imaging performed for other reasons. Occult gastrointestinal bleeding due to an extraperitoneal localization is a rare occurrence. Differential diagnosis may be very hard and includes benign and malignant neoplasms.We describe the case of a 68-year-old Caucasian man that was admitted for an increasing lower gastrointestinal bleeding associated to a vague abdominal pain.He was assessed by means of laboratory tests, as well as by endoscopic and radiological examinations, and successfully treated with an exclusive medical approach.The patient was discharged on the ninth day and currently he is doing well.This case shows that wait and see could prove a feasible attitude for the management of clinically stable patients.

Biliary and pancreatic stenting: Devices and insertion techniques in therapeutic endoscopic retrograde cholangiopancreatography and endoscopic ultrasonography.

Stents are tubular devices made of plastic or metal. Endoscopic stenting is the most common treatment for obstruction of the common bile duct or of the main pancreatic duct, but also employed for the treatment of bilio-pancreatic leakages, for preventing post- endoscopic retrograde cholangiopancreatography pancreatitis and to drain the gallbladder and pancreatic fluid collections. Recent progresses in techniques of stent insertion and metal stent design are represented by new, fully-covered lumen apposing metal stents. These stents are specifically designed for transmural drainage, with a saddle-shape design and bilateral flanges, to provide lumen-to-lumen anchoring, reducing the risk of migration and leakage. This review is an update of the technique of stent insertion and metal stent deployment, of the most recent data available on stent types and characteristics and the new applications for biliopancreatic stents.

Outcomes of Radiofrequency Ablation for Dysplastic Barrett's Esophagus: A Comprehensive Review.

Barrett's esophagus is a condition in which the normal squamous lining of the esophagus has been replaced by columnar epithelium containing intestinal metaplasia induced by recurrent mucosal injury related to gastroesophageal reflux disease. Barrett's esophagus is a premalignant condition that can progress through a dysplasia-carcinoma sequence to esophageal adenocarcinoma. Multiple endoscopic ablative techniques have been developed with the goal of eradicating Barrett's esophagus and preventing neoplastic progression to esophageal adenocarcinoma. For patients with high-grade dysplasia or intramucosal neoplasia, radiofrequency ablation with or without endoscopic resection for visible lesions is currently the most effective and safe treatment available. Recent data demonstrate that, in patients with Barrett's esophagus and low-grade dysplasia confirmed by a second pathologist, ablative therapy results in a statistically significant reduction in progression to high-grade dysplasia and esophageal adenocarcinoma. Treatment of dysplastic Barrett's esophagus with radiofrequency ablation results in complete eradication of both dysplasia and of intestinal metaplasia in a high proportion of patients with a low incidence of adverse events. A high proportion of treated patients maintain the neosquamous epithelium after successful treatment without recurrence of intestinal metaplasia. Following successful endoscopic treatment, endoscopic surveillance should be continued to detect any recurrent intestinal metaplasia and/or dysplasia. This paper reviews all relevant publications on the endoscopic management of Barrett's esophagus using radiofrequency ablation.

Role of stenting in gastrointestinal benign and malignant diseases.

Advances in stents design have led to a substantial increase in the use of stents for a variety of digestive diseases. Initially developed as a non-surgical treatment for palliation of esophageal cancer, the stents now have an emerging role in the management of malignant and benign conditions as well as in all segments of the gastrointestinal tract. In this review, relevant literature search and expert opinions have been used to evaluate the key-role of stenting in gastrointestinal benign and malignant diseases.

Novel endoscopic management for pancreatic pseudocyst with fistula to the common bile duct.

Pancreatic pseudocyst formation is a well-known complication of pancreatitis. It represents about 75% of the cystic lesions of the pancreas and might be located within or surrounding the pancreatic tissue. Sixty percent of the occurrences resolve spontaneously and only persistent, symptomatic or complicated cysts need to be treated. Complications include infection, hemorrhage, gastric outlet obstruction, splenic infarction and rupture. The formation of fistulas to other viscera is rare and most commonly occurs within the stomach, duodenum or colon. We report a case of a patient with a pancreatic pseudocyst in communication with the common bile duct. There have been only few cases reported in the literature. We successfully managed our case by performing an endoscopic ultrasound-guided drainage of the pancreatic collection and a contemporaneous stenting of the common bile duct. Performed independently, both drainages are effective, safe and well-coded and the expertise on these procedures is widespread. By our knowledge this therapeutic approach was never reported in literature but we retain this is the most correct treatment for this very rare condition.

Oldest biliary endoprosthesis in situ.

The advantages of endoscopic retrograde cholangiopancreatography over open surgery have made it the predominant method of treating patients with choledocholithiasis. After sphincterotomy, however, 10%-15% of common bile duct stones cannot be removed with a basket or balloon. The methods for managing "irretrievable stones" include surgery, mechanical lithotripsy, intraductal or extracorporeal shock wave lithotripsy and biliary stenting. The case presented was a referred 82-year-old Caucasian woman with a 7-year-old plastic biliary endoprosthesis in situ. To the best of our knowledge the examined endoprosthesis is the oldest endoprosthesis in situ reported in the literature. Endoscopic biliary endoprosthesis placement remains a simple and safe procedure for patients with stones that are difficult to manage by conventional endoscopic methods and for patients who are unfit for surgery or who are high surgical risks. To date no consensus has been reached regarding how long a biliary prosthesis should remain in situ. Long-term biliary stenting may have a role in selected elderly patients if stones extraction has failed because the procedure may prevent stones impaction and cholangitis.

Placement of a new fully covered self-expanding metal stent for postoperative biliary strictures and leaks not responding to plastic stenting.

Fully covered self-expanding metal stents (FCSEMSs) are now being used to treat postoperative biliary strictures (BSs) and biliary leaks (BLs). The aim of this study was to assess the safety and effectiveness of a new FCSEMS (Wallflex) in patients with postoperative BSs and BLs after failure of traditional endoscopic treatment. Between January 2010 and December 2011, 16 patients (10 patients with postcholecystectomy BSs, 4 with postcholecystectomy BLs, and 2 with postorthotopic liver transplantation BSs) were enrolled. The technical and clinical success rate was 100%. All FCSEMSs were removed after a mean of 141 days. Complications occurred in 7 cases: 2 postprocedure pain, 2 mild pancreatitis, 1 early distal, and 2 late proximal FCSEMS migration. The overall long-term clinical success rate was 94% after a mean follow-up of 13 months. In our experience, the placement of FCSEMSs is an effective and secure method of treating refractory postoperative BSs or BLs.