Endoscopic ultrasound-guided lumen-apposing metal stent with or without coaxial plastic stent for pancreatic fluid collections: a systematic review and meta-analysis comparing safety and efficacy.

Background: Endoscopic ultrasound (EUS)-guided lumen-apposing metal stents (LAMS) are preferred for draining symptomatic large pancreatic fluid collections (PFCs). A concurrent coaxial double-pigtail plastic stent (DPPS) is proposed to reduce adverse events associated with LAMS. We aimed to perform a comparative outcome analysis of LAMS with or without DPPS for PFCs. Methods: Electronic databases from January 2005 through July 2023 were searched for studies comparing the use of LAMS with or without DPPS for PFCs. Pooled proportions were calculated using fixed (inverse variance) and random-effects (DerSimonian-Laird) models. Results: After reviewing 1780 studies, we extracted data from 6 studies comprising 348 patients. The weighted odds of overall technical success, using LAMS plus DPPS compared to LAMS alone, were 0.53 (95% confidence interval [CI] 0.15-1.83), and the odds of clinical success were 1.10 (95%CI 0.59-2.05). The weighted odds of total adverse events with LAMS compared to LAMS plus DPPS were 2.21 (95%CI 1.37-3.59). Analysis of individual adverse events showed that the odds of stent occlusion when LAMS alone was used compared to LAMS plus DPPS was 2.36 (95%CI 1.12-4.98). The odds of bleeding were 1.84 (95%CI 0.77-4.38), and the odds of stent migration 0.95 (95%CI 0.40-2.23). Conclusions: EUS-guided LAMS placement is the current standard of care for managing symptomatic large PFCs. Concurrent use of coaxial DPPS can mitigate the overall adverse events observed with LAMS, while maintaining similar technical and clinical success.

Endoscopic Ultrasound-Guided vs Endoscopic Retrograde Cholangiopancreatography-Guided Biliary Drainage as Primary Approach to Malignant Distal Biliary Obstruction: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.

INTRODUCTION: Endoscopic ultrasound-guided biliary drainage (EUS-BD) is an alternative to endoscopic retrograde cholangiopancreatography (ERCP)-guided transpapillary drainage in malignant distal biliary obstruction (MDBO). This meta-analysis of randomized controlled trials (RCTs) aims to compare the outcomes of these 2 approaches. METHODS: Electronic databases from January 2005 through December 2023 were searched for RCTs comparing outcomes of EUS-BD and ERCP for treating MDBO. Pooled proportions, risk ratio (RR), and odds ratio were calculated using random-effects models. RESULTS: Five RCTs comprising 519 patients were included in the final analysis. The pooled RR for overall technical success with EUS-BD compared with ERCP was 1.05 (95% confidence interval [CI] = 0.96-1.16, P = 0.246, I2 = 61%) and for clinical success was 0.99 (95% CI = 0.95-1.04, P = 0.850, I2 = 0%). The pooled rate of procedure-related pancreatitis was 7.20% (95% CI = 3.60-13.80, I2 = 34%) in the ERCP group compared with zero in the EUS-BD group. The pooled RR for stent dysfunction with EUS-BD compared with ERCP was 0.48 (95% CI = 0.28-0.83, P = 0.008, I2 = 7%). The weighted mean procedure time was 13.43 (SD = 10.12) minutes for EUS-BD compared with 21.06 (SD = 6.64) minutes for ERCP. The mean stent patency was 194.11 (SD = 52.12) days in the EUS-BD group and 187 (SD = 60.70) days in the ERCP group. DISCUSSION: EUS-BD is an efficient and safe alternative to ERCP in MDBO. An almost nonexistent risk of procedure-related pancreatitis, lower procedure time, and ease of use make this an attractive primary approach to biliary decompression in centers with expertise.

Efficacy of scissor-type knife for endoscopic submucosal dissection: a systematic review and meta-analysis.

Background: Endoscopic submucosal dissection (ESD) is an effective resection technique for early cancers and large gastrointestinal luminal lesions. However, ESD is technically challenging, with the potential for severe adverse events. Scissor-type ESD (ST-ESD) knives with an inner cutting edge and an electrically insulated external coating could mitigate some of these risks. This study aimed to evaluate the performance of ST electrosurgical knives when used for ESDs. Methods: Electronic databases were queried for studies from January 2005 through December 2022 evaluating the performance of ST-ESD knives. Fixed- and random-effects models were used to calculate pooled proportions. Heterogeneity was assessed using the I2 test and by constructing funnel plots, while bias was calculated using Egger and Harbord bias indicators. Results: Final analysis included data from 17 studies comprising 1652 ESD procedures. The pooled en bloc resection rate and R0 resection rate were 97.94% (95% confidence interval [CI] 97.20-98.57) and 94.32% (95%CI 93.11-95.43), respectively. The main adverse events were perforation and delayed post-procedural bleeding, with pooled rates of 1.07% (95%CI 0.63-1.62) and 1.86% (95%CI 1.26-2.56), respectively. There was no heterogeneity, as indicated by an I2 score of 0% (95%CI 0-44.50%). The mean procedure time was 67.45 min (95%CI 58.01-76.89). Conclusions: Our analysis shows that ST-ESD knives deliver consistently good performance across various locations in the gastrointestinal lumen and lesion sizes, with a good safety profile. This could be particularly appealing to newer adopters of ESD.

Value of Endoscopic Ultrasound-Guided Through-the-Needle Biopsy in Pancreatic Cystic Lesions. A Systematic Review and Meta-Analysis.

BACKGROUND AND AIM: Endoscopic ultrasound-guided through-the-needle biopsy (EUS-TTNB) has been used over the past few years to increase diagnostic accuracy for pancreatic cystic lesions (PCLs). However, many concerns remain regarding its widespread use. This systematic review and meta-analysis aimed to pool the data from high-quality studies to evaluate the utility of EUS-TTNB in diagnosing PCLs. METHODS: Electronic databases (PubMed, Embase, and Cochrane Library) from January 2010 through October 2022 were searched for publications addressing the diagnostic performance of EUS-TTNB in the diagnosis of pancreatic cystic lesions. Pooled proportions were calculated using fixed (inverse variance) and random-effects (DerSimonian-Laird) models. RESULTS: The initial search identified 635 studies, of which 35 relevant articles were reviewed. We extracted data from 11 studies that met the inclusion criterion, comprising a total of 575 patients. Mean patient age was 62.25 years ± 6.12 with females constituting 61.39% of the study population. Pooled sensitivity of EUS-TTNB in differentiating a PCL as neoplastic or non-neoplastic was 76.60% (95% CI = 72.60-80. 30). For the same indication, EUS TTNB had a pooled specificity of 98.90% (95% CI = 93.80-100.00). The positive likelihood ratio was 10.28 (95% CI = 4.77-22.15), and the negative likelihood ratio was 0.26 (95% CI = 0.22-0.31). The pooled diagnostic odds ratio for EUS-TTNB in diagnosing PCLs as malignant/pre-malignant vs. non-malignant was 41.34 (95% CI = 17.42-98.08). Pooled adverse event rates were 3.04% (95% CI = 1.83-4.54) for pancreatitis, 4.02% (95% CI = 2.61-5.72) for intra-cystic bleeding, 0.94% (95% CI = 0.33-1.86) for fever, and 1.73% (95% CI = 0.85-2.91) for other minor events. CONCLUSIONS: EUS-TTNB has good sensitivity with excellent specificity in accurately classifying PCLs as neoplastic or non-neoplastic. Adding EUS-TTNB to EUS-FNA increases the accuracy of EUS-guided approach in diagnosing PCLs. However, it could significantly increase the risk of post-procedural pancreatitis.

Efficacy of self-assembling peptide in mitigating delayed bleeding after advanced endoscopic resection of gastrointestinal lesions: A meta-analysis.

Background and study aims Advanced endoscopic resection techniques carry a risk of delayed bleeding (DB). A novel fully synthetic self-assembling peptide (SAP) has shown promising results in mitigating this risk. In this meta-analysis, we evaluated all available data and analyzed the effectiveness of SAP in reducing DB after advanced endoscopic resection of gastrointestinal luminal lesions. Patients and methods Electronic databases (PubMed, Embase, and Cochrane Library) from January 2010 through October 2022 were searched for publications addressing the use of SAP solution in patients undergoing advanced endoscopic resection of gastrointestinal lesions. Pooled proportions were calculated using fixed (inverse variance) and random-effects (DerSimonian-Laird) models. Results The initial search identified 277 studies, of which 63 relevant articles were reviewed. The final analysis included data from six studies comprising 307 patients that met inclusion criteria. The pooled rate of DB was 5.73 % (95 % confidence interval [CI] = 3.42-8.59). Mean patient age was 69.40 years ± 1.82. The weighted mean size of resected lesions was 36.20 mm (95 % CI = 33.37-39.02). Endoscopic submucosal dissection was used in 72.69 % (95 % CI = 67.62-77.48), while endoscopic mucosal resection was used in 26.42 % (95 % CI = 21.69-31.44) of the procedures. Among the 307 patients, 36 % were on antithrombotic medications. No adverse events (AEs) were attributable to using SAP, with a pooled rate of 0.00 % (95 % CI = 0.00-1.49). Conclusions SAP solution appears promising in reducing post-procedural DB after advanced endoscopic resection of high-risk gastrointestinal lesions with no reported AEs.

Prevalence of Osteoporosis in Cirrhosis: A Systematic Review and Meta-Analysis.

The prevalence of osteoporosis in individuals with cirrhosis varies based on the diagnostic approach and etiology of the underlying liver disease. This systematic review aims to evaluate the prevalence of osteoporosis in individuals with cirrhosis. Electronic databases were searched for studies reporting the prevalence of osteoporosis among patients with cirrhosis. The primary outcome was the presence of osteoporosis, as determined by a dual-energy x-ray absorptiometry (DEXA) scan. Secondary outcomes were levels of biochemical markers of bone metabolism, including calcium, vitamin D, phosphorus, and parathormone (PTH) levels. A cohort of 836 patients from 10 studies was included in the final analysis. The pooled rate of osteoporosis was 14.80% (95% CI: 14.19-15.49). Pooled levels of biochemical markers of bone metabolism were as follows: calcium 9.09 mg/dL (95% CI: 8.73-9.45), 25-hydroxyvitamin D (25-OH vitamin D) 15.41 ng/mL (95% CI: 14.79-16.03), phosphorus 15.41 mg/dL (95% CI: 2.99-3.51), and PTH 26.58 pg/mL (95% CI: 25.45-27.71). Pooled levels of liver biochemistries were: bilirubin 3.04 mg/dL (95% CI: 2.84-3.25), aspartate aminotransferase (AST) 65.35 U/L (95% CI: 61.39-69.31), alanine aminotransferase (ALT) 50.17 U/L (95% CI: 46.18-54.10), alkaline phosphatase 133.31 U/L (95% CI: 124.89-141.73), and albumin 3.25 g/dL (95% CI: 3.05-3.45). Cirrhosis appears to be associated with an increased risk for osteoporosis, with a pooled prevalence of 15%. This can include men and individuals younger than 50 years of age, a cohort not typically considered to be at an increased risk of osteoporosis. Levels of 25-hydroxyvitamin D and insulin-like growth factor-1 (IGF-1) were also significantly low. Further studies are required to evaluate the risk of osteoporosis based on the etiology and stage of cirrhosis, especially in younger males, to incorporate this into future prediction models for fragility fractures.

Learning curve for esophageal peroral endoscopic myotomy: a systematic review and meta-analysis.

BACKGROUND AND STUDY AIMS : Peroral endoscopic myotomy (POEM) is a minimally invasive endoscopic procedure for the treatment of achalasia and certain spastic esophageal motility disorders, delivering excellent results in experienced hands. However, this complex and technically challenging procedure requires advanced endoscopic skills. The aim of this study was to conduct a systematic review and meta-analysis of current data to evaluate the learning curve for POEM in new adopters of this technique. METHODS : Electronic databases (PubMed, Embase, and Cochrane Library) from inception to November 2021 were searched for publications addressing the learning curve in POEM. Pooling was conducted by both fixed- and random-effects models. Secondary outcomes reviewed were clinical success defined by Eckardt score ≤ 3 when available and adverse events. RESULTS : Eight studies involving 1904 patients met the inclusion criteria. In the pooled analysis, new adopters of POEM attained proficiency at a mean of 24.67 procedures (95 %CI 23.93 to 25.41). Once proficiency was achieved, the pooled total procedure time plateaued at a mean of 85.38 minutes (95 %CI 81.48 to 89.28), the pooled mean procedure time per centimeter of myotomy was 6.25 minutes (95 %CI 5.69 to 6.82), and the pooled mean length of myotomy was 11.49 cm (95 %CI 10.90 to 12.08). CONCLUSIONS : Our analysis showed that new adopters of POEM with previous advanced endoscopy experience required about 25 procedures to attain proficiency. The average time for each procedure once proficiency was attained was about 85 minutes.

Efficacy and Safety of Peroral Endoscopic Myotomy (POEM) in Achalasia: An Updated Meta-analysis.

Background: Heller myotomy has been considered the standard surgical treatment for patients with achalasia. Since the initiation of peroral endoscopic myotomy (POEM), it has represented an alternative for treating patients with achalasia. Over the years, numerous prospective and retrospective studies with POEM use for achalasia have been published. We performed a systematic review and meta-analysis to evaluate the efficacy and safety of POEM in patients with achalasia. Methods: Publications investigating the safety and efficacy of POEM in patients with achalasia were searched in Medline, Ovid Journals, Medline non-indexed citations, and Cochrane Central Register of Controlled Trials and Database of Systematic Reviews. Pooling was conducted by both fixed and random effects models. Results: The initial search identified 328 reference articles; of these, 34 relevant articles were selected and reviewed. Data was extracted from 20 studies (n=1753) which met the inclusion criteria. In pooled analysis, the clinical success of POEM at 3 months was 94% (95% CI=93-95). The pooled clinical success of POEM at 12 months was 91% (95% CI=90-92). The pooled rate of gastroesophageal reflux disease (GERD) was 21% (95% CI=19-23), esophagitis was reported in 16% (95% CI=15-18), pneumomediastinum in 4% (95% CI=3-6), cervical emphysema in 12% (95% CI=10-13), pneumoperitoneum in 8% (95% CI=7-10), pneumothorax in 5% (95% CI=4 - 6), pleural effusion in 3% (95% CI=2-3), post-operative bleeding in 4.29% (95% CI=1.91 -7.61) and aspiration pneumonia in 3.08% (95% CI=1.13-5.97) of the patients after POEM. Conclusion: This meta-analysis suggests that POEM is a highly effective and safe endoscopic treatment for patients with achalasia and a reasonable alternative to Heller myotomy.

Water-jet vs traditional triangular tip knife in peroral endoscopic myotomy for esophageal dysmotility: A systemic review and meta-analysis.

BACKGROUND: Peroral endoscopic myotomy is an increasingly used less invasive modality to treat esophageal dysmotility. Recently, triangular tip knife with integrated water jet function has been introduced to mitigate multiple instrument exchanges. AIM: To compare traditional triangular tip knife and water jet knife in terms of procedural success, duration, instrument exchanges, coagulation forceps use, and adverse events. METHODS: We conducted a systemic review and meta-analysis with two authors independently in electronic databases (PubMed, Embase, and Cochrane Library) from inception through May 2021. In addition, we conducted a relevant search by Reference Citation Analysis (RCA) (https://www.referencecitationanalysis.com). A fixed-effects model was used to calculate weighted mean, odds ratio (OR), and confidence intervals (CI). RESULTS: We included 7 studies involving 558 patients. Triangular knife and water jet knife were similar in odds of procedural success with ratio of 4.78 (95%CI = 0.22-102.47) and odds of clinical success with ratio of 0.93 (95%CI = 0.29-2.97), respectively. Water jet knife had fewer instrument exchanges compared to triangular knife (2.21, 95%CI = 1.98-2.45 vs 11.9, 95%CI = 11.15-12.70) and usage of coagulation forceps (1.75, 95%CI = 1.52-1.97 vs 2.63, 95%CI = 2.37-2.89). Adverse events were higher in triangular knife group (OR: 2.30, 95%CI = 1.35-3.95). CONCLUSION: Peroral endoscopic myotomy using water jet knife is comparable in terms of procedural success to triangular tip knife. Water jet knife also required shorter procedural duration, less instrument exchanges, coagulation devices, and overall adverse events.

Adverse events in fecal microbiota transplantation: a systematic review and meta-analysis.

Background: Fecal microbiota transplantation (FMT) is a highly efficacious procedure used most commonly for the treatment of recurrent Clostridioides difficile infection (CDI). Despite the high value of incorporating FMT into practice, there remain concerns about its safety. To the best of our knowledge, there has not been an updated meta-analysis reporting pooled rates of adverse events in FMT for CDI. Methods: A search for studies of FMT in patients with CDI was performed with the rate of serious adverse events (SAEs) related to FMT evaluated as the primary outcome. Secondary outcomes included SAEs unrelated to FMT and minor adverse events associated with FMT. A pooled analysis was then performed. Results: Initial search identified 378 reference articles. Data were extracted from the 61 of these studies that met the inclusion criteria, comprising 5099 patients. Pooled analysis showed that SAEs related to FMT developed in less than 1% of patients. The pooled rate of SAEs not related to FMT was higher at 2.9%. The pooled rate of minor adverse events also showed infrequent self-limited gastrointestinal and systemic discomfort. Conclusions: This meta-analysis supports FMT as a safe option for treating recurrent CDI. Future randomized trials are needed to improve our current understanding of FMT safety and further examine the improvements in the quality of life of patients treated with FMT compared to standard therapy of antibiotics.

Utility of Cyst Fluid Carcinoembryonic Antigen in Differentiating Mucinous and Non-mucinous Pancreatic Cysts: An Updated Meta-Analysis.

BACKGROUND: Mucinous pancreatic cysts are considered premalignant and managed differently compared to benign pancreatic cystic lesions. The aim of this updated meta-analysis is to assess the diagnostic accuracy of cyst carcinoembryonic antigen (CEA) in differentiating between mucinous and non-mucinous pancreatic cysts. METHODS: Studies comparing the diagnostic accuracy of CEA (cutoff level of 192 ng/mL) in differentiating between mucinous and non-mucinous pancreatic cysts were searched in Medline, Ovid journals, Medline nonindexed citations, and Cochrane Central Register of Controlled Trials and Database of Systematic Reviews. Pooled estimates of diagnostic precision were calculated using random and fixed effects models. RESULTS: Initial search identified 526 reference articles, of these 34 relevant articles were selected and reviewed. Data were extracted from 15 studies (n = 2063) which met the inclusion criteria. The pancreatic cystic fluid CEA level at a 192 ng/mL cutoff value had pooled specificity of 88.6% (95% CI 85.9-90.9) and pooled sensitivity was found to be 60.4% (95% CI 57.7-62.9). The pooled positive likelihood ratio was 4.5 (95% CI 2.9-6.9) and the pooled negative likelihood ratio was 0.45 (95% CI 0.38-0.52). The pooled diagnostic odds ratio, the odds of having mucinous cyst with elevated CEA, was 11.4 (95% CI 6.9-18.7). The P for chi-squared heterogeneity for all the pooled accuracy estimates was > 0.10. CONCLUSIONS: This meta-analysis suggests that the cyst fluid CEA level at a 192 ng/mL cutoff value is highly specific in the diagnosis of mucinous cystic lesions with reasonable sensitivity.

Efficacy and safety of endoscopic transpapillary gallbladder drainage in acute cholecystitis: An updated meta-analysis.

BACKGROUND: Percutaneous transhepatic gallbladder drainage has been the most frequently performed treatment for acute cholecystitis for patients who are not candidates for surgery. Endoscopic transpapillary gallbladder drainage (ETGBD) has evolved into an alternative treatment. There have been numerous retrospective and prospective studies evaluating ETGBD for acute cholecystitis, though results have been variable. AIM: To evaluate the efficacy and safety of ETGBD in the treatment of inoperable patients with acute cholecystitis. METHODS: We performed a systematic review of major literature databases including PubMed, OVID, Science Direct, Google Scholar (from inception to March 2021) to identify studies reporting technical and clinical success, and post procedure adverse events in ETGBD. Weighted pooled rates were then calculated using fixed effects models for technical and clinical success, and post procedure adverse events, including recurrent cholecystitis. RESULTS: We found 21 relevant articles that were then included in the study. In all 1307 patients were identified. The pooled technical success rate was 82.62% [95% confidence interval (CI): 80.63-84.52]. The pooled clinical success rate was found to be 94.87% (95%CI: 93.54-96.05). The pooled overall complication rate was 8.83% (95%CI: 7.42-10.34). Pooled rates of post procedure adverse events were bleeding 1.03% (95%CI: 0.58-1.62), perforation 0.78% (95%CI: 0.39-1.29), peritonitis/bile leak 0.45% (95%CI: 0.17-0.87), and pancreatitis 1.98% (95%CI: 1.33-2.76). The pooled rates of stent occlusion and migration were 0.39% (95%CI: 0.13-0.78) and 1.3% (95%CI: 0.75-1.99) respectively. The pooled rate of cholecystitis recurrence following ETGBD was 1.48% (95%CI: 0.92-2.16). CONCLUSION: Our meta-analysis suggests that ETGBD is a feasible and efficacious treatment for inoperable patients with acute cholecystitis.

EUS-guided celiac plexus neurolysis for pain in pancreatic cancer patients - a meta-analysis and systematic review.

Background: Endoscopic ultrasound guided celiac plexus neurolysis (EUS- CPN) has been reported to be an effective way to help with pain in pancreatic cancer patient. The aim of our updated meta-analysis is to assess the efficacy of pain relief in patients with pancreatic cancer who underwent EUS guided neurolysis. Methods: Pooled proportions were calculated using both Mantel-Haenszel method (fixed effects model) and DerSimonian Laird method (random effects model). The heterogeneity among studies was tested using Cochran's Q test based upon inverse variance weights.  Results: Initial search identified 176 reference articles, of which 34 were selected and reviewed in detail. Sixteen studies that met the inclusion criteria were included in this analysis. The mean age of patients undergoing neurolysis was 56.31 ± 19.72 years. Number of males, N = 563 (57.4%), was higher than the number of females, N = 417 (42.5%). The pooled proportion of patients who showed pain relief with EUS-guided neurolysis was 71% (95% CI = 68-74). Bias calculated using Begg-Mazumdar was not significant (p = 0.8). In a subgroup analysis, when comparing the central and bilateral techniques, the pooled proportion of patients with pain relief was 66% (95% CI = 61-71) and 57% (95% CI = 48-67), respectively. Conclusions: Our results show that EUS guided CPN could provide relief in as much as 70% of patients with central neurolysis technique having some edge over peripheral neurolysis. Further larger scale randomized controlled trials may further help to elaborate the efficacy of central vs peripheral neurolysis.

Early vs late cholecystectomy in mild gall stone pancreatitis: An updated meta-analysis and review of literature.

BACKGROUND: Gallstone pancreatitis is one of the most common causes of acute pancreatitis. Cholecystectomy remains the definitive treatment of choice to prevent recurrence. The rate of early cholecystectomies during index admission remains low due to perceived increased risk of complications. AIM: To compare outcomes including length of stay, duration of surgery, biliary complications, conversion to open cholecystectomy, intra-operative, and post-operative complications between patients who undergo cholecystectomy during index admission as compared to those who undergo cholecystectomy thereafter. METHODS: Statistical Method: Pooled proportions were calculated using both Mantel-Haenszel method (fixed effects model) and DerSimonian Laird method (random effects model). RESULTS: Initial search identified 163 reference articles, of which 45 were selected and reviewed. Eighteen studies (n = 2651) that met the inclusion criteria were included in this analysis. Median age of patients in the late group was 43.8 years while that in the early group was 43.6. Pooled analysis showed late laparoscopic cholecystectomy group was associated with an increased length of stay by 88.96 h (95%CI: 86.31 to 91.62) as compared to early cholecystectomy group. Pooled risk difference for biliary complications was higher by 10.76% (95%CI: 8.51 to 13.01) in the late cholecystectomy group as compared to the early cholecystectomy group. Pooled analysis showed no risk difference in intraoperative complications [risk difference: 0.41%, (95%CI: -1.58 to 0.75)], postoperative complications [risk difference: 0.60%, (95%CI: -2.21 to 1.00)], or conversion to open cholecystectomy [risk difference: 1.42%, (95%CI: -0.35 to 3.21)] between early and late cholecystectomy groups. Pooled analysis showed the duration of surgery to be prolonged by 39.11 min (95%CI: 37.44 to 40.77) in the late cholecystectomy group as compared to the early group. CONCLUSION: In patients with mild gallstone pancreatitis early cholecystectomy leads to shorter hospital stay, shorter duration of surgery, while decreasing the risk of biliary complications. Rate of intraoperative, post-operative complications and chances of conversion to open cholecystectomy do not significantly differ whether cholecystectomy was performed early or late.

Endoscopic ultrasound-guided fiducial marker placement in pancreatic cancer: A systematic review and meta-analysis.

BACKGROUND: Pancreatic cancer (PC) mortality remains high despite advances in therapy. Combination chemoradiotherapy offers modest survival benefit over monotherapy with either. Fiducial markers serve as needed landmarks for image-guided radiotherapy (IGRT). Traditionally, these markers were placed surgically or percutaneously with limitations of each. Endoscopic ultrasound-guided placement overcomes these limitations. AIM: To evaluate the safety, efficacy, and feasibility of endoscopic ultrasound (EUS)-guided fiducial placement for PC undergoing IGRT. METHODS: Articles were searched in MEDLINE, PubMed, and Ovid journals. Pooling was conducted by fixed and random effects models. Heterogeneity was assessed using Cochran's Q test based upon inverse variance weights. RESULTS: Initial search identified 1024 reference articles for EUS-guided fiducial placement in PC. Of these, 261 relevant articles were reviewed. Data was extracted from 11 studies (n = 820) meeting inclusion criteria. Pooled proportion of successful placement was 96.27% (95%CI: 95.35-97.81) with fiducial migration rates low at 4.33% (95%CI: 2.45-6.71). Adverse event rates remained low, with overall pooled proportion of 4.85% (95%CI: 3.04-7.03). CONCLUSION: EUS-guided placement of fiducial markers for IGRT of PC is safe, feasible, and efficacious. The ability to target deep structures under direct visualization while remaining minimally invasive are added benefits. Moreover, the ability to perform fine needle aspiration or celiac plexus neurolysis add value and increase patient-care efficiency. Whether EUS-guided fiducial placement improves outcomes in IGRT or offers any mortality benefits over traditional placement remains unknown and future studies are needed.

Peroral cholangioscopy with cholangioscopy-directed biopsies in the diagnosis of biliary malignancies: a systemic review and meta-analysis.

BACKGROUND AND AIM: Accurate diagnosis is essential in the appropriate management of biliary strictures. Our aim is to evaluate the efficacy of cholangioscopy-directed biopsies in differentiating biliary intraductal malignancies from benign lesions. MATERIALS AND METHODS: Articles were searched in Medline, PubMed, and Ovid journals. Pooling was performed by both fixed-effects and random-effects models. Only studies from which a 2×2 table could be constructed for true-positive, false-negative, false-positive, and true-negative values were included. RESULTS: Initial search identified 2110 reference articles for peroral cholangioscopy; of these, 160 relevant articles were selected and reviewed. Data were extracted from 15 studies (N=539) that fulfilled the inclusion criteria. Pooled sensitivity of cholangioscopy-directed biopsies in diagnosing malignancy was 71.9% [95% confidence interval (CI): 66.1-77.1] and pooled specificity was 99.1% (95% CI: 96.9-99.9). The positive likelihood ratio of cholangioscopy-directed biopsies was 18.1 (95% CI: 9.1-35.8), whereas the negative likelihood ratio was 0.3 (95% CI: 0.2-0.4). The pooled diagnostic odds ratio was 71.6 (95% CI: 32.8-156.4). All the pooled estimates calculated by fixed-effects and random-effect models were similar. Summary receiver operating characteristic curves showed an area under the curve of 0.98. The χ heterogeneity for all the pooled accuracy estimates was 5.62 (P=0.96). CONCLUSION: Peroral cholangioscopy with cholangioscopy-directed biopsies has a high specificity in differentiating intraductal malignancies from benign lesions. Cholangioscopy-directed biopsies should be strongly considered for biliary stricture evaluation.

Cap-assisted colonoscopy versus standard colonoscopy: is the cap beneficial? A meta-analysis of randomized controlled trials.

BACKGROUND: In an effort to improve visualization during colonoscopy, a transparent plastic cap or hood may be placed on the end of the colonoscope. Cap-assisted colonoscopy (CAC) has been studied and is thought to improve polyp detection. Numerous studies have been conducted comparing pertinent clinical outcomes between CAC and standard colonoscopy (SC) with inconsistent results. METHODS: Numerous databases were searched in November 2016. Only randomized controlled trials (RCTs) involving adult subjects that compared CAC to SC were included. Outcomes of total colonoscopy time, time to cecum, cecal intubation rate, terminal ileum intubation rate, polyp detection rate (PDR), and adenoma detection rate (ADR) were analyzed in terms of odds ratio (OR) or mean difference (MD) with fixed effect and random effects models. RESULTS: Five hundred eighty-nine articles and abstracts were discovered. Of these, 23 RCTs (n=12,947) were included in the analysis. CAC showed statistically significant superiority in total colonoscopy time (MD -1.51 min; 95% confidence interval [CI] -2.67 to -0.34; P<0.01) and time to cecum (MD -0.82 min; 95%CI -1.20 to -0.44; P<0.01) compared to SC. CAC also showed better PDR (OR 1.17; 95%CI 1.06-1.29; P<0.01) but not ADR (OR 1.11; 95%CI 0.95-1.30; P=0.20). In contrast, on sensitivity analysis, ADR was better with CAC. Terminal ileum intubation and cecal intubation rates demonstrated no significant difference between the two groups (P=0.11 and P=0.73, respectively). CONCLUSIONS: The use of a transparent cap during colonoscopy improves PDR while reducing procedure times. ADR may improve in cap-assisted colonoscopy but further studies are required to confirm this.

Role of endoscopic esophageal dilation in managing eosinophilic esophagitis: A systematic review and meta-analysis.

BACKGROUND: Eosinophilic esophagitis (EoE) is a chronic, immune-mediated disorder of the esophagus characterized by mucosal eosinophilic infiltration. Topical glucocorticoids are considered standard line of treatment, whereas endoscopic dilations are performed for patients presenting with treatment-resistant disease or manifestations of dysphagia and/or food impactions. Efficacy and safety of esophageal dilation in these patients are currently unclear. AIMS: Primary outcomes were to evaluate the efficacy, adverse events, and mortality rates of endoscopic esophageal dilation in patients with EoE. METHODS: STUDY SELECTION CRITERIA:: Studies that reported the use of esophageal dilation in EoE patients were included in this meta-analysis. DATA COLLECTION AND EXTRACTION: Articles were searched in Medline, Pubmed, and Ovid journals. Two authors independently searched and extracted data. The study design was written in accordance to PRISMA statement. Clinical improvement was defined as patient-reported symptom relief noted by the authors of individual studies. The symptoms were assessed on various nonstandardized, however, relevant questionnaires that were deemed appropriate by the senior authors of individual studies. STATISTICAL METHOD: Pooled proportions were calculated using fixed- and random-effects model. I statistic was used to assess heterogeneity among studies. RESULTS: Initial search identified 491 reference articles, in which 39 articles were selected and reviewed. Data were extracted from 14 studies (N = 1607) using esophageal dilation for EoE management, which met the inclusion criterion. Mean age of patients was 41years. Pooled patients included 75% males. The pooled proportion of patients that showed clinical improvement with esophageal dilations, after the median follow-up period of 12 months, was 84.95%. No procedure-related deaths were noted. The pooled proportion of patients with post procedural esophageal perforation, chest pain, hospitalization, deep mucosal tear (involving muscularis propria), small mucosal tear, and hemorrhage were 0.61%, 0.06%, 0.74%, 4.04%, 22.32%, and 0.38% respectively. I (inconsistency) was 0% (95% confidence interval [CI] = 0-49.8) and Egger: bias was 0.06 (95% CI = -0.30 to 0.42). CONCLUSIONS: In patients with conformed diagnosis of EoE, endoscopic esophageal dilation seems to be an effective and safe treatment option. Majority patients with chest pain and deep mucosal tears did not require hospitalization and symptoms were self-limiting.