Endoscopic Full-Thickness Resection of Colorectal Lesions with the New FTRD System: Single-Center Experience

Device-assisted endoscopic full-thickness resection in colorectum: Systematic review and meta-analysis

OBJECTIVES

Endoscopic full-thickness resection (EFTR) is emerging as an effective modality for mucosal and submucosal lesions in the colorectum. In this systematic review and meta-analysis, we aimed to analyze the success and safety of device-assisted EFTR in the colon and rectum.

METHODS

A literature search was performed in the Embase, PubMed, and Medline databases for studies evaluating device-assisted EFTR between inception to October 2022. The primary outcome of the study was clinical success (R0 resection) with EFTR. Secondary outcomes included technical success, procedure duration, and adverse events.

RESULTS

In all, 29 studies with 3467 patients (59% male patients, 3492 lesions) were included in the analysis. The lesions were located in right colon (47.5%), left colon (28.6%), and rectum (24.3%). EFTR was performed for subepithelial lesions in 7.2% patients. The pooled mean size of the lesions was 16.6 mm (95% confidence interval [CI] 14.9-18.2, I2 98%). Technical success was achieved in 87.1% (95% CI 85.1-88.9%, I2 39%) procedures. The pooled rate of en bloc resection was 88.1% (95% CI 86-90%, I2 47%) and R0 resection was 81.8% (95% CI 79-84.3%, I2 56%). In subepithelial lesions, the pooled rate of R0 resection was 94.3% (95% CI 89.7-96.9%, I2 0%). The pooled rate of adverse events was 11.9% (95% CI 10.2-13.9%, I2 43%) and major adverse events requiring surgery was 2.5% (95% CI 2.0-3.1%, I2 0%).

CONCLUSION

Device-assisted EFTR is a safe and effective treatment modality in cases with adenomatous and subepithelial colorectal lesions. Comparative studies are required with conventional resection techniques, including endoscopic mucosal resection and submucosal dissection.

Outcomes of endoscopic full thickness resection in the colon rectum at an Italian tertiary center

PURPOSE

Endoscopic full-thickness resection (EFTR) is an innovative technique for the treatment of colonic lesions not feasible by conventional endoscopic resection. Here, we aimed to evaluate the efficacy and safety of a Full-Thickness Resection Device (FTRD) for colonic lesions in a high-volume tertiary referral center.

METHODS

A review of a prospectively collected database on patients that underwent EFTR with FTRD for colonic lesions from June 2016 to January 2021 at our institution was performed. Data regarding the clinical history, previous endoscopic treatments, pathological examination, technical and histological success, and follow-up were evaluated.

RESULTS

Thirty-five patients (26 males, median age 69 years) underwent FTRD for colonic lesion. Eighteen lesions were in the left colon, three in the transverse, and 12 in the right colon. The median size of the lesions was 13 (range 10-40) mm. Resection was technically successful in 94% of patients. The mean hospital stay was 3.2 (SD ± 1.2) days. Adverse events were reported in four cases (11.4%). Histological complete resection (R0) was achieved in 93.9% of cases. Endoscopic follow-up was available in 96.8% of patients, at a median duration of 14.6 months (3-46 months). Recurrence was observed in 19.4% of cases at a median time of 3 months (3-7 months). Five patients had multiple FTRD performed, with R0 resection in three cases. In this subset, adverse events were observed in 40% of cases.

CONCLUSIONS

FTRD is safe and feasible for standard indication. The non-negligible rate of recurrence observed suggests the need for close endoscopic follow-up in these patients. Multiple EFTR could help achieve complete resection in selected cases; however, in this setting, a higher risk of adverse events was observed.

Endoscopic Full Thickness Resection: A Systematic Review

Background Endoscopic full thickness resection (EFTR) is an emerging therapeutic option for resecting subepithelial lesions (SELs) and epithelial neoplasms. We aimed to systematically review the techniques, applications, outcomes, and complications of EFTR.

Methods A systematic literature search was performed using PubMed. All relevant original research articles involving EFTR were included for the review along with case report/series describing novel/rare techniques from 2001 to February 2022.

Results After screening 7,739 citations, finally 141 references were included. Non-exposed EFTR has lower probability of peritoneal contamination or tumor seeding compared with exposed EFTR. Among exposed EFTR, tunneled variety is associated with lower risk of peritoneal seeding or contamination compared with non-tunneled approach. Closure techniques involve though the scope (TTS) clips, loop and clips, over the scope clips (OTSC), full thickness resection device (FTRD), and endoscopic suturing/plicating/stapling devices. The indications of EFTR range from esophagus to rectum and include SELs arising from muscularis propria (MP), non-lifting adenoma, recurrent adenoma, and even early gastric cancer (EGC) or superficial colorectal carcinoma. Other indications include difficult locations (involving appendicular orifice or diverticulum) and full thickness biopsy for motility disorders. The main limitation of FTRD is feasibility in smaller lesions (<20–25 mm), which can be circumvented by hybrid EFTR techniques. Oncologic resection with lymphadencetomy for superficial GI malignancy can be accomplished by hybrid natural orifice transluminal endoscopic surgery (NOTES) combining EFTR and NOTES. Bleeding, perforation, appendicitis, enterocolonic fistula, FTRD malfunction, peritoneal tumor seeding, and contamination are among various adverse events. Post OTSC artifacts need to be differentiated from recurrent/residual lesions to avoid re-FTRD/surgery.

Conclusion EFTR is safe and effective therapeutic option for SELs, recurrent and non-lifting adenomas, tumors in difficult locations and selected cases of superficial GI carcinoma.

Endoscopic Full-Thickness Resection for Colorectal Lesions: A Systematic Review and Meta-Analysis

INTRODUCTION

Endoscopic full-thickness resection (EFTR) with an over-the-scope full-thickness resection device is a relatively new technique for the resection of colorectal lesions. Multiple centers have published the results of case series and observational cohorts regarding the use of this technique for managing difficult polyps. This study aims to aggregate the results of these studies to determine the effectiveness and safety of this technique in the resection of these technically challenging colonic lesions.

METHODS

MEDLINE, EMBASE, and CENTRAL were searched. Articles were included if they reported technical success rate for EFTR of colonic lesions. The primary outcome was technical success rate and secondary outcomes included rate of R0 resection and overall 30-d morbidity. DerSimonian and Laird random-effects meta-analysis of proportions was used to generate effect sizes for pooled outcomes.

RESULTS

From 2211 citations, 21 studies with 1539 patients (mean age 67.2 y, 39.5% female) undergoing 1551 procedures were included. Difficult to resect benign lesions were the most commonly excised lesions (hyperplastic: 35.9%; adenomas: 30.2%), followed by T1 adenocarcinomas (25.6%) and neuroendocrine tumors (6.1%). Technical success rate was 89% (95% confidence interval [CI] 87-92), and R0 resection rate was 79% (95% CI 76-82). Mean procedure time was 53.5 min and mean specimen size was 17.5 mm. Overall 30-d morbidity was 11% (95% CI 7-13), and incidences of perforation and postpolypectomy bleeding were 2% (95% CI 1-2) and 5% (95% CI 3-7), respectively. Lesion recurrence at 3-mo follow-up was 8%.

CONCLUSIONS

EFTR requires further large sample size, comparative studies with reporting of long-term oncologic data. However, preliminary findings indicate that it is a safe and effective technique with high rates of technical success and acceptable rates of R0 resection when employed by experienced endoscopists for high-risk colonic lesions.

Endoscopic full-thickness resection of colorectal lesions: a systematic review and meta-analysis

BACKGROUND AND AIMS

Endoscopic full-thickness resection (EFTR) is a novel endoscopic technique for the resection of GI lesions not amenable to standard endoscopic therapy. The primary aim of this study was to perform a systematic review and meta-analysis to evaluate EFTR for the resection of colorectal lesions.

METHODS

Individualized searches were developed through October 2020 in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses and Meta-Analysis of Observational Studies in Epidemiology guidelines. Random-effects models were used to determine pooled technical success, margin-negative (R₀) resection, adverse events, procedure duration, and rate of recurrence at follow-up. Subgroup analysis was used to assess the impact of specific procedure techniques and regression analyses to determine influence of lesion size. Heterogeneity was assessed with I² statistics and publication bias by funnel plots using Egger and Begg tests.

RESULTS

Fourteen studies (1936 subjects; 39.6% women) were included. Most EFTR lesions were located in the colon (75.8%) with the remaining in the rectum. Mean procedure duration was 45.4 ± 11.4 minutes. Pooled technical success was 87.6% (95% confidence interval [CI], 85.1-89.8; I² = 33), R₀ resection rate was 78.8% (95% CI, 75.7-81.5; I² = 33), procedure-associated adverse events occurred in 12.2% (95% CI, 9.3-15.9; I² = 61), and recurrence rate was 12.6% (95% CI, 11.1-14.4; I² = 0) over an average weighted follow-up of 20.1 ± 3.8 weeks. Regression analyses revealed significantly lower R₀ resection (odds ratio, .3; 95% CI, .2-.6; I² = 61; P = .0003) and higher overall procedure-associated adverse event rates (odds ratio, 3.5; 95% CI, 1.8-7.2; I² = 55; P = .0004) for lesions >20 mm.

CONCLUSIONS

EFTR overall appears to be an effective modality with high technical success and R₀ resection rate with a relatively low risk of adverse events and recurrence, with greatest success when lesions are <20 mm.

Systematic review and meta-analysis on effectiveness and safety of the full-thickness resection device (FTRD) in the colon

BACKGROUND

 Endoscopic full-thickness resection (EFTR) has expanded the possibilities of endoscopic resection. The full-thickness resection device (FTRD, Ovesco Endoscopy, Tübingen, Germany) combines a clip-based defect closure and snare resection in a single device.

METHODS

 Systematic review and meta-analysis on effectiveness and safety of the FTRD in the colon.

RESULTS

 A total of 26 studies (12 published as full-text articles and 14 conference papers) with 1538 FTRD procedures were included. The pooled estimate for reaching the target lesion was 96.1 % (95 % confidence interval [95 % CI]: 94.6-97.1) and 90.0 % (95 % CI: 87.0-92.3) for technically successful resection. Pooled estimate of histologically complete resection was 77.8 % (95 % CI: 74.7-80.6). Adverse events occurred at a pooled estimate rate of 8.0 % (95 % CI: 5.8-10.4). Pooled estimates for bleeding and perforation were 1.5 % (95 % CI: 0.3-3.3) and 0.3 % (95 % CI: 0.0-0.9), respectively. The rate for need of emergency surgery after FTRD was 1.0 % (95 % CI: 0.4-1.8).

CONCLUSION

 The use of the FTRD in the colon shows very high rates of technical success and complete resection (R0) as well as a low risk of adverse events. Emergency surgery after colonic FTRD resection is necessary in single cases only.

Endoscopic diagnosis and treatment of gastric dysplasia and early cancer: Current evidence and what the future may hold

Gastric cancer accounts for a significant proportion of worldwide cancer-related morbidity and mortality. The well documented precancerous cascade provides an opportunity for clinicians to detect and treat gastric cancers at an endoscopically curable stage. In high prevalence regions such as Japan and Korea, this has led to the implementation of population screening programs. However, guidelines remain ambiguous in lower prevalence regions. In recent years, there have been many advances in the endoscopic diagnosis and treatment of early gastric cancer and precancerous lesions. More advanced endoscopic imaging has led to improved detection and characterization of gastric lesions as well as superior accuracy for delineation of margins prior to resection. In addition, promising early data on artificial intelligence in gastroscopy suggests a future role for this technology in maximizing the yield of advanced endoscopic imaging. Data on endoscopic resection (ER) are particularly robust in Japan and Korea, with high rates of curative ER and markedly reduced procedural morbidity. However, there is a shortage of data in other regions to support the applicability of protocols from these high prevalence countries. Future advances in endoscopic therapeutics will likely lead to further expansion of the current indications for ER, as both technology and proceduralist expertise continue to grow.

Current Status and Prospects of Endoscopic Resection Technique for Colorectal Tumors

Currently, endoscopic submucosal dissection (ESD) is a well-established and common treatment for intramucosal colorectal cancer in Japan. However, colorectal ESD is technically more difficult to perform than esophageal and gastric ESD, and some lesions, such as fibrotic lesions, are difficult to dissect by endoscopy. Several techniques, such as the pocket-creation method and laparoscopically assisted endoscopic polypectomy, have been utilized for challenging targets. In recent years, endoscopic full-thickness resection (EFTR) using full-thickness resection devices have mainly been performed in Western countries. We have used laparoscopy and endoscopy cooperative surgery for colorectal tumors (LECS-CR) since 2011 for the challenging treatment of colorectal ESD. Improvements in ESD techniques have resulted in an increase in the literature on EFTR, and LECS-CR may be considered an effective endoscopic technique for colorectal ESD in the future.

Methods for Endoscopic Removal of Over-the-Scope Clip: A Systematic Review

AIMS

The over-the-scope clip (OTSC) has recently emerged as a new endoscopic device for treating gastrointestinal bleeding, perforations, fistulas, and leaks. A modified OTSC device (full-thickness resection device, FTRD) has been widely used for endoscopic full-thickness resection. However, there is less experience regarding the indications and methods for OTSC removal. We aimed to summarize the existing methods and indications for OTSC removal.

METHODS

We searched PubMed, Cochrane Library, and ClinicalTrials.gov to identify relevant publications on OTSC removal. The details of OTSC removal, including the methods, indications, success rates, adverse events, and failure causes, were extracted and summarized. A meta-analysis of pooled success rates was conducted using STATA 15.0.

RESULTS

Eighteen articles were included. The reported methods for OTSC removal included (1) grasping forceps, (2) the Nd : YAG laser, (3) argon plasma coagulation, (4) the remOVE system, (5) endoscopic mucosal resection/endoscopic submucosal dissection, and (6) ice-cold saline solution. Indications for OTSC removal were (1) poor healing, (2) OTSC misplacement, (3) repeat biopsy/therapy or further treatment, (4) adverse events after OTSC implantation, (5) removal after recovery, and (6) patient wishes. The pooled success rate of OTSC removal was 89% in patients treated with the remOVE system. Minor bleeding, superficial thermal damage, and superficial mucosal tears were common adverse events. Mucosal overgrowth was the main cause of OTSC removal failure.

CONCLUSIONS

The remOVE system is the best investigated method, with sufficient efficacy and safety for OTSC removal. This is the first systematic review of OTSC removal and provides significant guidance for clinical practice.

Fatal Outcome Consequent to an Endoscopic Full Thickness Resection of a Colonic Lateral Spreading Tumor: A Case Report

Patient: Male, 77-year-old

Final Diagnosis: Enterocolic fistula

Symptoms: Diarrhea • pain and guarding of the abdomen • weight loss

Medication:—

Clinical Procedure: Colonoscopy with colon biopsy

Specialty: Gastroenterology and Hepatology

Technical success, resection status, and procedural complication rate of colonoscopic full-wall resection: a pooled analysis from 7 hospitals of different care levels

Introduction

Endoscopic full-thickness resection (eFTR) using the full-thickness resection device (FTRD®) is a novel minimally invasive procedure that allows the resection of various lesions in the gastrointestinal tract including the colorectum. Real-world data outside of published studies are limited. The aim of this study was a detailed analysis of the outcomes of colonoscopic eFTR in different hospitals from different care levels in correlation with the number of endoscopists performing eFTR.

Material and methods

In this case series, the data of all patients who underwent eFTR between November 2014 and June 2019 (performed by a total of 22 endoscopists) in 7 hospitals were analyzed retrospectively regarding rates of technical success, R0 resection, and procedure-related complications.

Results

Colonoscopic eFTR was performed in 229 patients (64.6% men; average age 69.3 ± 10.3 years) mainly on the basis of the following indication: 69.9% difficult adenomas, 21.0% gastrointestinal adenocarcinomas, and 7.9% subepithelial tumors. The average size of the lesions was 16.3 mm. Technical success rate of eFTR was achieved in 83.8% (binominal confidence interval 78.4–88.4%). Overall, histologically complete resection (R0) was achieved in 77.2% (CI 69.8–83.6%) while histologically proven full-wall excidate was confirmed in 90.0% (CI 85.1–93.7%). Of the resectates obtained (n = 210), 190 were resected en bloc (90.5%). We did not observe a clear improvement of technical success and R0 resection rate over time by the performing endoscopists. Altogether, procedure-related complications were observed in 17.5% (mostly moderate) including 2 cases of acute gangrenous appendicitis requiring operation.

Discussion

In this pooled analysis, eFTR represents a feasible, effective, and safe minimally invasive endoscopic technique.

Electronic supplementary material

The online version of this article (10.1007/s00464-020-07772-5) contains supplementary material, which is available to authorized users.

Endoscopic full-thickness resection using a clip non-exposed method for gastrointestinal tract lesions: a meta-analysis

Background and study aims  Endoscopic full-thickness resection (EFTR) allows for treatment of epithelial and sub-epithelial lesions (SELs) unsuitable to conventional resection techniques. This meta-analysis aimed to assess the efficacy and safety of clip-assisted method for non-exposed EFTR using FTRD or over-the-scope clip of gastrointestinal tumors. Methods  A comprehensive literature search was performed. The primary outcome of interest was the rate of histologic complete resection (R0). Secondary outcomes of interest were the rate of enbloc resection, FTR, adverse events, and post-EFTR surgery. Random-effects model was used to calculate pooled estimates and generate forest plots. Results  Eighteen studies with 730 patients and 733 lesions were included in the analyses. Indications for EFTR were difficult/residual colorectal adenoma, adenoma at a diverticulum or appendiceal orifice and early cancer (n = 634), colorectal SELs (n = 42), and upper gastrointestinal lesions (n = 51), other colonic lesions (n = 6). Median size of lesions was 13.5 mm. There were 22 failed EFTR attempts. Pooled overall R0 resection rate was 82 % (95 % CI: 75, 89). The pooled overall FTR rate was 83 % (95 % CI: 77, 89). The pooled overall enbloc resection rate was 95 (95 % CI: 92, 96). The pooled estimates for perforation and bleeding were < 0.1 % and 2 %, respectively. Following EFTR, a total of 110 patients underwent surgery for any reason [pooled rate 7 % (95 % 2, 14). The pooled rates for post-EFTR surgery due to invasive cancer, for non-curative endoscopic resection and for adverse events were 4 %, < 0.1 % and < 0.1 %, respectively. No mortality related to EFTR was noted. Conclusions  EFTR appears to be safe and effective for gastrointestinal lesions that are not amenable to conventional endoscopic resection. This technique should be considered as an alternative to surgery in selected cases.