Risk factors for procedure-related complications after endoscopic resection of colorectal laterally spreading tumors

Endoscopic mucosal resection using anchored snare Tip-in versus precut technique for small rectal neuroendocrine tumors

BACKGROUND/AIMS

Small rectal neuroendocrine tumors (NETs) can be treated with modified endoscopic mucosal resection (EMR). However, an optimal EMR method remains to be established. We aimed to assess the non-inferiority of Tip-in EMR versus precut EMR (EMR-P) for treating rectal NETs.

METHODS

This prospective, multicenter, randomized controlled trial enrolled patients with rectal NETs of < 10 mm in diameter. The patients were randomly assigned to EMR-P and Tip-in EMR groups in a 1:1 ratio. Primary outcome was margin-negative (R0) resection rate between the two methods, with a noninferiority margin of 10%.

RESULTS

Seventy-five NETs in 73 patients, including 64 eligible lesions (32 lesions in each, EMR-P and Tip-in EMR groups), were evaluated. In a modified intention-to-treat analysis, R0 resection rates of the EMR-P and Tip-in EMR groups were 96.9% and 90.6%, respectively, which did not demonstrate non-inferiority (risk difference, -6.3 [95% confidence interval: -18.0 to 5.5]). Resection time in the EMR-P group was longer than that in the Tip-in EMR group (p < 0.001). One case of intraprocedural bleeding was reported in each group.

CONCLUSION

We did not demonstrate the non-inferiority of Tip-in EMR compared to EMR-P for treating small rectal NETs. However, the R0 resection rates for both techniques were high enough for clinical application.

Adverse events and residual lesion rate after cold endoscopic mucosal resection of serrated lesions ≥10 mm

BACKGROUND AND AIMS

Cold EMR is being increasingly used for large serrated lesions. We sought to measure residual lesion rates and adverse events after cold EMR of large serrated lesions.

METHODS

In a single academic center, we retrospectively examined a database of serrated class lesions ≥10 mm removed with cold EMR for safety and efficacy.

RESULTS

Five hundred sixty-six serrated lesions ≥10 mm in size were removed from 312 patients. We successfully contacted 223 patients (71.5%) with no reported serious adverse events that required hospitalization, repeat endoscopy, or transfusion. The residual lesion rate per lesion at first follow-up colonoscopy was 18 of 225 (8%; 95% confidence interval, 5-12.1). Lesions with residual were larger at polypectomy compared with lesions without recurrence (median, 23 mm versus 16 mm, P = .017).

CONCLUSION

Cold EMR appears to be safe and effective for the removal of large serrated lesions.

The risk factors for delayed bleeding after endoscopic resection of colorectal tumors: a meta-analysis

INTRODUCTION

The most common complication of post-colorectal endoscopic resection is delayed bleeding. The assessment of risk factors for delayed bleeding provides important and useful information in standard clinical operations. The risk factors have been previously reported; however, they remain inconsistent across different studies.

AREAS COVERED

In this meta-analysis, the patient conditions, lesion-related factors, and operation-related factors were compared between delayed bleeding and no bleeding. PubMed, Cochrane, Embase, China National Knowledge Infrastructure (CNKI), and Wanfang Database were searched to identify eligible studies. Pooled odds ratio (OR) and 95% confidence intervals (CI) were calculated along with heterogeneity.

EXPERT OPINION

This study is the first meta-analysis to investigate risk factors for colorectal delayed bleeding. We found several risk factors contributing to this condition: colorectal tumors located in the proximal colon, a history of antithrombotic drug use, high-grade intraepithelial neoplasia or early cancer, piecemeal resection, intraoperative hemorrhage, no clip placement, and severe submucosal fibrosis. Despite our findings, we also conclude that more high-quality, large-scale clinical randomized controlled studies are needed due to limited retrospective studies at present. Future therapeutic colonoscopies should focus on precise diagnosis, treatment safety, and management during the perioperative period.

Risk factors for serious adverse events associated with multiband mucosectomy in Barrett's esophagus: an international multicenter analysis of 3827 endoscopic resection procedures

BACKGROUND AND AIMS

Multiband mucosectomy (MBM) is a widely used technique for the treatment of Barrett's esophagus (BE). However, large multicenter studies enabling a generalizable estimation of the risk of serious adverse events, such as perforation and postprocedural bleeding, are lacking. The aim of this study was to estimate the rate of, and risk factors for, serious adverse events associated with MBM.

METHODS

In this retrospective analysis, consecutive patients who underwent MBM for treatment of BE in 14 tertiary referral centers in Europe, the United States, Canada, and Australia were included. Primary outcomes were perforation and postprocedural bleeding rate. Potential risk factors were identified by logistic regression.

RESULTS

Between 2001 and 2016, a total of 3827 MBM procedures were performed in 2447 patients (84% male, mean age 66 years, median BE length C2M4). Perforation occurred in 17 procedures (0.4%; 95% confidence interval [CI], 0.3-0.7), of which 15 could be treated endoscopically or conservatively. Female gender was an independent risk factor for perforation (odds ratio [OR], 2.77; 95% CI, 1.02-7.57; P = .05). Postprocedural bleeding occurred after 35 procedures (0.9%; 95% CI, 0.6-1.3). The number of resections (OR, 1.15; 95% CI, 1.06-1.25; P < .001) was significantly associated with postprocedural bleeding.

CONCLUSION

The results of this study show that MBM for BE is safe with a low risk of serious adverse events. In addition, most of the adverse events could be managed endoscopically or conservatively. The number of resections was an independent risk factor for postprocedural bleeding.