Retrospective cohort study comparing endoscopic ultrasound-guided and percutaneous drainage of upper abdominal abscesses

Diagnostic and therapeutic role of endoscopic ultrasound in liver diseases: A systematic review and meta-analysis

BACKGROUND

In hepatology, the clinical use of endoscopic ultrasound (EUS) has experienced a notable increase in recent times. These applications range from the diagnosis to the treatment of various liver diseases. Therefore, this systematic review summarizes the evidence for the diagnostic and therapeutic roles of EUS in liver diseases.

AIM

To examine and summarize the current available evidence of the possible roles of the EUS in making a suitable diagnosis in liver diseases as well as the therapeutic accuracy and efficacy.

METHODS

PubMed, Medline, Cochrane Library, Web of Science, and Google Scholar databases were extensively searched until October 2023. The methodological quality of the eligible articles was assessed using the Newcastle-Ottawa scale or Cochrane Risk of Bias tool. In addition, statistical analyses were performed using the Comprehensive Meta-Analysis software.

RESULTS

Overall, 45 articles on EUS were included (28 on diagnostic role and 17 on therapeutic role). Pooled analysis demonstrated that EUS diagnostic tests had an accuracy of 92.4% for focal liver lesions (FLL) and 96.6% for parenchymal liver diseases. EUS-guided liver biopsies with either fine needle aspiration or fine needle biopsy had low complication rates when sampling FLL and parenchymal liver diseases (3.1% and 8.7%, respectively). Analysis of data from four studies showed that EUS-guided liver abscess had high clinical (90.7%) and technical success (90.7%) without significant complications. Similarly, EUS-guided interventions for the treatment of gastric varices (GV) have high technical success (98%) and GV obliteration rate (84%) with few complications (15%) and rebleeding events (17%).

CONCLUSION

EUS in liver diseases is a promising technique with the potential to be considered a first-line therapeutic and diagnostic option in selected cases.

Endoscopic Ultrasound (EUS)-guided Drainage of Caudate Lobe Abscess: A Single Center Experience

BACKGROUND

Liver abscess is usually treated with medical therapy. Few patients require drainage of the collection due to large size, certain high-risk location or rupture of the collection. Percutaneous drainage is most commonly used modality for the drainage of such collection. However, caudate lobe poses a unique difficulty in percutaneous drainage due to its deep location.

METHODS

We did a retrospective analysis of all patients with caudate lobe abscess who underwent endoscopic ultrasound (EUS)-guided drainage at our center. We reviewed their indications, technical and clinical success rates of the procedure from 2020 to 2023. We also performed systemic review of published literature till June 12, 2023 showing use of EUS-guided drainage of caudate lobe abscess.

RESULTS

Total of 8 patients (age: 37.33 ± 12.8 y; Males 62.5%) underwent EUS-guided drainage of caudate lobe collection at our center. Six patients underwent drainage using plastic stents, 1 patient underwent using metal stent, and 1 patient had aspiration of the abscess. Technical success was achieved in all patients. One patient succumbed to background illness and clinical success could be achieved in rest of the patients. In systemic review of literature on EUS-guided drainage of caudate lobe, a total of 10 studies (17 patients) were included. All patients achieved technical success. Majority studies reported use of plastic stents or naso-cystic drains whereas only 1 case reported use of metal stents. One procedure related complication (localized para-esophageal abscess) was reported requiring endoscopic intervention for management.

CONCLUSION

EUS-guided drainage of caudate lobe abscess is safe and effective. It should be used as a first-line intervention after a failed medical management.

Efficacy and safety of endoscopic drainage versus percutaneous drainage for pancreatic fluid collection; a systematic review and meta-analysis

BACKGROUND/AIMS

Pancreatic fluid collections (PFC) are debris or fluid of the pancreas that needs to be drained out. This may result from surgery or necrotizing pancreatitis. This meta-analysis compared the outcomes of PFC through endoscopic and percutaneous interventions.

METHODS

A medical database was searched up to June 2022, comparing the outcomes of endoscopic drainage (ED) and percutaneous drainage (PD) for the PFC. Eligible studies reporting clinical and technical success and adverse events were selected.

RESULTS

Seventeen studies with 1170 patients were included for meta-analysis, of which 543 patients underwent ED and 627 underwent PD. The odd ratio (OR) of technical success was 0.81 (95% confidence interval (CI) 0.31, 2.1) and clinical success was in the favor of the ED group at OR 2.23 (95% CI 1.45, 3.41). Adverse events OR 0.62 (95% CI 0.27, 1.39) and stent migration OR 0.61 (95% CI 0.10, 3.88) were the same in both groups, but hospital stay pooled mean difference of 15.02 days (95% CI 9.86, 20.18), mortality OR 0.24 (95% CI 0.09, 0.67), and re-interventions OR 0.25 (95% CI 0.16, 0.40) favored ED.

CONCLUSIONS

ED is safe and efficient for PFC with higher clinical success, lower mortality rate, hospital stay, and re-interventions compared with PD.

EUS-guided drainage of a segment VI liver abscess using a lumen-apposing metal stent

Video 1EUS-guided FNA and lumen-apposing metallic stent deployment.

Efficacy of endoscopic ultrasound-guided abscess drainage for non-pancreatic abscesses: A retrospective study

Background and Aim

Percutaneous drainage of intra-abdominal abscesses is often uncomfortable for the patient and may result in prolonged hospital stays. Recent studies have shown that endoscopic ultrasound-guided abscess drainage (EUS-AD) could effectively treat various abscesses and fluid collections. However, no indications or procedures have been established for EUS-AD treatments, and studies on its usefulness and safety are insufficient. The present study aimed to evaluate the efficacy and safety of EUS-AD for treating non-pancreatic abscesses.

Methods

This retrospective study included 20 patients, aged ≥20 years, who underwent EUS-AD for an abscess or fluid accumulation in the abdomen or mediastinum, but not the pancreas. Patients were treated at the Kawasaki University General Medical Center between March 2013 and June 2021. All EUS-AD procedures were performed prior to a percutaneous drainage or surgical drainage.

Results

Among the 20 patients who underwent an EUS-AD for abscess, 8 (40%) had liver abscesses, 6 (30%) had intraperitoneal abscesses, 3 had (15%) splenic abscesses, 1 (5%) had a mediastinal abscess, 1 (5%) had an iliopsoas abscess (n = 1, 5%), and 1 (5%) had an abdominal wall abscess. The technical success rate was 95% (n = 19/20). We inserted nasobiliary catheters in 4/20 patients (20%). The clinical success rate was 90% (n = 18/20). Two clinical failures required reintervention, and both were treated with percutaneous drainage. Adverse events were observed in 2/20 patients (10%). One patient experienced fever after the procedure, and the other experienced localized peritonitis.

Conclusion

EUS-AD was effective and safe for abscess removal, particularly when approached from the upper gastrointestinal tract.

EUS-guided endoscopic internal drainage with lumen-apposing metal stent for symptomatic hepatic cysts: a case series (with video)

Background and study aims  Simple hepatic cysts (SHCs) are usually asymptomatic and detected incidentally. However, larger cysts may present with clinical signs and require treatment such as percutaneous aspiration or surgery with non negligeable rate of recurrence. We report a series of 13 consecutive patients who underwent EUS-guided lumen-apposing metal stent (LAMS) drainage of SHCs of the right and left liver. Patients and methods  Nine men and four women, average age 71.9 years, underwent EUS-guided LAMS cyst drainage because of significant symptoms. At 1 month, LAMS was exchanged for a double pigtail stent (DPS), which was left in place for 3 months. Nine of the SHCs were located in the right liver and four in the left. The average diameter was 22.2 cm. Results  Thirteen LAMS were successful delivered in all patients. However only 12 of 13 (92.3 %) remained in place. In one case, the LAMS slipped out immediately and was promptly removed and the cyst treated percutaneously. One of 12 patients experienced bleeding, which was treated conservatively. In seven patients, the LAMS was exchanged for a DPS; in the other five, it was successfully left in place until the patients died, given their comorbidities. At 10.5 months of follow-up, none of the SHCs had recurred. Conclusions  EUS-guided LAMS drainage permits treatment of symptomatic SHCs without recurrence and with few adverse events. Comparative studies are needed to consider this approach as first intention.

Diagnostic and interventional EUS in hepatology: An updated review

EUS has become an increasingly used diagnostic and therapeutic modality in the armamentarium of endoscopists. With ever-expanding indications, EUS is being used in patients with liver disease, for both diagnosis and therapy. EUS is playing an important role in providing additional important information to that provided by cross-sectional imaging modalities such as computerized tomography and magnetic resonance imaging. Domains of therapy that were largely restricted to interventional radiologists have become accessible to endosonologists. From liver biopsy and sampling of liver lesions to ablative therapy for liver lesions and vascular interventions for varices, there is increased use of EUS in patients with liver disease. In this review, we discuss the various diagnostic and therapeutic applications of EUS in patients with various liver diseases.

Endosonography-Guided Caudate Lobe Liver Abscess Drainage: A Case and Review of Methods

There are only 11 cases of caudate lobe liver abscess drainage described in the published literature. We present a case of liver abscess drainage done by endosonography (EUS) and review of various EUS-guided liver abscess drainage techniques and endoprostheses. Here we have aimed at reviewing the data for paving the way for the development of a consensus for liver abscess drainage.

Endoscopic ultrasound-guided drainage to abdominal abscess: A systematic review and meta-analysis

Background:

Ultrasound (US)- or computed tomography-guided drainage for abdominal abscess is currently the first-line options for drainage, but both options have disadvantages. Patients without adequate windows for drainage mostly undergo surgical drainage. However, surgical drainage is invasive and expensive. Endoscopic US (EUS)-guided drainage is a minimally invasive alternative for abdominal abscess, but there is less consensus on its efficacy, safety and complications. This meta-analysis aims to evaluate EUS-guided drainage for abdominal abscess.

Materials and Methods:

We retrieved relevant papers on EUS-guided drainage for abdominal abscess from the PubMed, Cochrane Library, Web of Science and EMBASE databases. Each paper was reviewed, and data were extracted. We used R software version 3.6.3 to perform the meta-analysis. Fixed effects models were used for merging data.

Results:

A total of 11 papers met the inclusion criteria, with a total sample population of 264 patients. The meta-analysis showed that the pooled clinical success rate was 90% (95% confidence interval [CI], 0.85–0.95), the technical success rate was 99% (95% CI, 0.97–1.00) and the recurrence rate was 1% (95% CI, 0.00–0.03). Three studies reported the complications, including perforation, bleeding and stent migration; none of the other eight studies reported complications. There were no significant differences between subgroups. There was no publication bias in either the clinical or the technical success rates.

Conclusions:

This meta-analysis showed that EUS-guided drainage for abdominal abscess was effective and safe, with an excellent technical success rate. In addition, EUS-guided drainage could be used for abscesses with complex anatomy. Nevertheless, complications and stent type should be considered.

Role of Endoscopic Ultrasound in Liver Disease: Where Do We Stand?

As the burden of liver disease in the general populace steadily increases, so does the need for both advanced diagnostic and treatment options. Endoscopic ultrasound is a reliable diagnostic and therapeutic method that has an established role, foremost in pancreatobiliary pathology. This paper aims to summarize the growing role of endoscopic ultrasound in hepatology based on the search of the current literature. A number of applications of endoscopic ultrasound are reviewed, including both noninvasive methods and tissue acquisition in focal and diffuse liver disease, portal hypertension measurement, detection and management of gastric and esophageal varices, treatment of focal liver lesions and staging of pancreatobiliary malignancies, treatment of cystic and solid liver lesions, as well as liver abscess drainage. Both hepatologists and endoscopists should be aware of the evolving role of endoscopic ultrasound in liver disease. The inherent invasive nature of endoscopic examination limits its use to a targeted population identified using noninvasive methods. Endoscopic ultrasound is one the most versatile methods in gastroenterology, allowing immediate access with detection, sampling, and treatment of digestive tract pathology. Further expansion of its use in hepatology is immanent.

Endoscopic ultrasound-guided drainage of a fungal liver abscess using a lumen-apposing metal stent: case report and literature review

Liver abscesses are rare entities for which percutaneous drainage is traditionally employed. The technique is simple, but associated with a significant rate of side effects and patient discomfort. We herein report a case of fungal left liver lobe abscess that was successfully treated by using EUS-guided drainage, with insertion of a large caliber lumen-apposing metal stent. The literature review we performed on the topic seems to favor, at least for abscess in the left and/or caudate liver lobes, EUS as compared to percutaneous drainage.

Endoscopic ultrasound-guided transgastric drainage of radiologically inaccessible left lobe liver abscess involving segment 4, caudate lobe, and left lateral segments using a modified technique

Liver abscess requiring drainage is conventionally managed by interventional radiology-guided percutaneous drainage (PCD). Radiologically inaccessible abscesses are managed with laparoscopic or open surgery, which carries high rates of morbidity and mortality. EUS-guided transluminal liver abscess drainage is minimally invasive and can be an alternative approach for caudate lobe, segment 4, and left lateral segment abscesses. We report on three consecutive patients with radiologically inaccessible left lobe liver abscess involving the caudate lobe, segment 4, and lateral segment in whom EUS-guided transluminal drainage using a modified technique was successful.

Endoscopic ultrasound guided hepatic interventions

Intervention for liver disease has predominantly been performed through the percutaneous approach. However, as endoscopic ultrasound (EUS) applications have expanded, there have emerged various EUS-guided interventions for liver disease, a space we call "Endo-Hepatology". EUS-guided liver biopsy can be considered the "forerunner" of Endo-Hepatology and has become a clinical option for patients requiring histologic diagnosis and staging of their liver disease. EUS also enables direct access to the portal vein. Subsequently, many procedures are being explored, such as angiography, measurement of the portosystemic pressure gradient, portal vein sampling to detect cancer cell or DNA, and EUS-guided transhepatic intrahepatic portosystemic shunt creation. Since the transducer is close to the liver, especially the left and caudate lobes, EUS can be used as a rescue when the percutaneous approach is not favorable and EUS-guided treatments of liver tumor, cyst and abscess have been reported. This review summarizes the available studies of EUS-guided intervention in the liver.

Is endoscopic drainage better than percutaneous drainage for patients with pancreatic fluid collections? A comparative meta-analysis

INTRODUCTION

though endoscopic and percutaneous drainage have emerged as the most common minimally invasive treatments for pancreatic fluid collections (PFCs), estimates of therapeutic superiority for either treatment have yielded inconsistent results.

METHODS

we retrieved studies comparing the efficacy and safety of these two approaches in PubMed, Embase, and the Cochrane Library. Primary outcomes were differences in technical success, clinical success, and adverse events, and secondary outcomes included differences in reintervention, need for surgical intervention, mortality, recurrence rate, and length of hospital stay.

RESULTS

there were nonsignificant differences in technical success rate (OR 0.54; CI: 0.15-1.86), clinical success rate (OR 1.39; CI: 0.82-2.37), adverse events rate (OR 1.21; CI: 0.70-2.11), mortality rate (OR 0.81; CI: 0.30-2.16), and recurrence rate (OR 1.94; CI 0.74-5.07) between the two groups. Reintervention rate (OR 0.19; CI: 0.08-0.45) and percentage of need for surgical intervention (OR 0.08; CI: 0.02-0.39) in the endoscopic drainage group were much lower than in the percutaneous drainage group. Total length of hospital stay (standard mean difference [SMD] -0.60; CI: -0.84 to -0.36) in the endoscopic drainage group was shorter; however, there was a nonsignificant difference in the length of post-procedure hospital stay (SMD: -0.30; CI: -1.05-0.44) between the two groups.

CONCLUSION

endoscopic drainage is effective for PFCs, and superior in terms of lower reintervention and need for surgery rates over traditional percutaneous drainage, despite a similar clinical efficacy and safety compared with traditional percutaneous drainage.

Endoscopic ultrasound-guided drainage of difficult-to-access liver abscesses

OBJECTIVES

Antibiotic therapy and percutaneous drainage have been the first-line treatments for liver abscesses. However, percutaneous drainage of abscesses may be challenging in difficult-to-access locations such as the caudate lobe. The aim of this review was to determine the indications, technical feasibility and efficacy of endoscopic ultrasound-guided drainage of difficult-to-access liver abscesses.

METHODS

A literature review of original articles, abstracts, case series and case reports describing endoscopic ultrasound-guided liver abscess drainage was performed. The indications, techniques and complications associated with endoscopic ultrasound-guided drainage were reviewed.

RESULTS

A total of 15 studies were identified. The main indications were failed antibiotic therapy and difficulty in gaining percutaneous access. The technique involved identification and puncturing of an abscess under endoscopic ultrasound guidance followed by placement of a prosthesis via a guide wire. The technique was 97.5% successful with no major complications reported.

CONCLUSION

Endoscopic ultrasound-guided drainage was feasible and safe and allowed complete drainage of liver abscesses not accessible by percutaneous drainage.