Accurate lesion size measurement is essential in endoscopic practice as it influences treatment strategies, surveillance decisions, and clinical outcomes, especially in colorectal polyps. Traditional measurement techniques, including visual estimation and biopsy forceps, have significant interobserver variability and procedural inefficiencies. Recent advancements in digital measurement technologies, including virtual scale endoscopy (VSE) and artificial intelligence (AI)-assisted virtual rulers, have addressed these limitations. VSE projects a virtual scale onto endoscopic images, enhancing measurement precision and reducing variability. Several studies have demonstrated its superior accuracy compared with conventional methods; however, limitations such as increased procedure time and operator training requirements persist. AI-assisted virtual rulers utilize deep learning algorithms to automate lesion size estimation, significantly improving reproducibility and diagnostic reliability. Although these technologies offer promising improvements, challenges remain, including real-time integration, standardization, and regulatory approval. Future research should focus on refining AI models, expanding validation studies, and optimizing their usability in routine practice. A hybrid approach that combines AI automation with real-time digital tools may enhance the precision and efficiency of endoscopic lesion assessment, ultimately improving patient outcomes.

Natural orifice transluminal endoscopic surgery (NOTES) represents an innovative advancement in minimally invasive surgery, utilizing natural body orifices to access the peritoneal cavity to minimize surgical trauma, reduce postoperative pain, and avoid visible scars. Since its inception, NOTES has faced challenges such as technical complexity and securing safe access closure, which initially limited its widespread adoption. However, advancements in endoscopic techniques and technology, closure devices, and hybrid approaches may revitalize its clinical utility. Hybrid NOTES, particularly transvaginal techniques, has demonstrated significant benefits, including reduced postoperative pain, faster recovery, and improved cosmesis, without compromising safety or efficacy. Innovations such as flexible endoscopic platforms, robotic assistance, and novel suturing techniques address previous limitations and enable broader applications across various gastrointestinal indications. Comparative studies have shown comparable outcomes between NOTES and traditional laparoscopy, with specific advantages in terms of patient comfort and recovery time. As technology evolves, NOTES continues to expand its clinical indications, and its future holds promise with the integration of robotics and artificial intelligence. Further research and structured training programs are crucial to overcome existing barriers and ensure safe and effective implementation in diverse clinical settings.

Endoscopic full-thickness resection (EFTR) is a minimally invasive technique that is increasingly used for gastrointestinal stromal tumors (GISTs) originating from the muscularis propria. Despite its advantages over conventional surgery, such as complete tumor resection and faster recovery, EFTR faces challenges related to its efficacy, safety, and feasibility, particularly in gastric GISTs. By summarizing the literature published over the past decade, this review provides a comprehensive overview of the clinical outcomes of EFTR and the evolution of defect closure devices.

Iatrogenic colonic perforation is a rare but serious complication of colonoscopy, particularly during therapeutic procedures. Prompt recognition and individualized management are essential to prevent adverse outcomes. This review summarizes current treatment strategies based on major international guidelines. Endoscopic closure is recommended for selected cases involving minor defects, early detection, and adequate bowel preparation. Techniques such as clipping, endoloop application, and suturing have demonstrated favorable success rates. Surgical intervention is crucial for larger, delayed, or complicated perforations, particularly those associated with significant contamination or clinical deterioration. Recognizing risk factors such as age, diverticulosis, and inadequate bowel preparation can help prevent this complication.

Background/Aims: Pancreatic stenting reduces post-endoscopic retrograde cholangiopancreatography pancreatitis (PEP) and aids in cannulation in difficult cases. However, conservative endoscopists may stop at this step, resulting in suboptimal outcomes. This study assessed the efficacy of transpancreatic precut sphincterotomy (TPS) as a rescue procedure following pancreatic stenting. Methods: Between March 2013 and November 2018, 82 patients underwent pancreatic stenting at our institution prior to successful biliary cannulation. TPS was introduced in April 2016, and patients were divided into Before TPS and After TPS groups. The outcomes included cannulation success, PEP incidence, and predictors of TPS conversion. Results: There were 43 and 39 patients in the Before TPS and After TPS groups, respectively. Twenty-two patients (56.4%) underwent conversion to TPS in the After TPS group. The After TPS group had a higher bile duct cannulation rate (89.7% vs. 72.1%) than the Before TPS group, but this difference was not statistically significant (p=0.054). Multivariate analysis showed that age >50 years (odds ratio [OR], 0.181; p=0.021) and being in the After TPS group (OR, 0.712; p=0.039) were independently associated with reduced PEP risk. Haraldsson Type 2 and Type 4 papillae carried a relatively high TPS conversion rate. Conclusions A stepwise cannulation strategy that incorporates TPS after pancreatic stenting minimizes the need for advanced techniques and improves PEP outcomes.

Background/Aims: Device-assisted enteroscopy has advanced small bowel disorder management. We conducted this meta-analysis to compare the clinical and procedural outcomes between spiral enteroscopy and single-balloon enteroscopy. Methods: A systematic search was performed on December 1, 2024, in the PubMed, Scopus, and Cochrane Library databases to identify studies that compared spiral enteroscopy and single-balloon enteroscopy. The outcomes included diagnostic and therapeutic yields, total procedure time, depth of maximum insertion, and adverse event rates. Results: Five studies (including 496 patients) met the inclusion criteria. The diagnostic yield was similar between spiral enteroscopy and single-balloon enteroscopy (risk ratio [RR], 1.07; 95% confidence interval [CI], 0.96–1.20; p=0.24). The therapeutic yield also showed no significant difference (RR, 1.10; 95% CI, 0.45–2.69; p=0.83). The total procedure time was comparable (mean difference, –22.85 minutes; 95% CI, –46.83 to 1.12; p=0.06), although motorized spiral enteroscopy reduced the procedure time (p<0.001). Spiral enteroscopy achieved greater depth of maximum insertion (standardized mean difference, 1.33; 95% CI, 0.65–2.01; p<0.001). Adverse event rates were comparable (RR, 1.72; 95% CI, 0.80–3.70; p=0.16). Conclusions Spiral and single-balloon enteroscopies demonstrated similar diagnostic and therapeutic yields and safety. Spiral enteroscopy achieved a greater insertion depth, and motorized systems improved the efficiency in terms of procedure times.

Background/Aims: Biliary cannulation is a critical component of endoscopic retrograde cholangiopancreatography (ERCP). When standard methods fail, needle-knife precut sphincterotomy (NKPS) is commonly employed. This systematic review and meta-analysis evaluated the safety and efficacy of using NKPS as a primary technique. Methods: Electronic databases were searched for studies published between January 2000 and November 2024 that assessed outcomes of primary precut techniques. “Primary precut” was defined as needle-knife sphincterotomy performed as the initial approach without any prior standard cannulation attempts. Pooled proportions were calculated using random-effects models, and heterogeneity was assessed using the Q-test and the I² statistic. Results: The mean patient age was 57.95 years (standard deviation [SD], 7.59), and 53.23% were female. The cannulation success rate was 96.50% (95% confidence interval [CI], 94.90–97.60) with no heterogeneity (Q, 7.10; df, 8; I²=0%; p=0.935). The rates of adverse events were as follows: post-ERCP pancreatitis, 1.90% (95% CI, 1.20–3.10; I²=0; p =0.942); bleeding, 2.60% (95% CI, 1.70–4.00, I²=0; p=0.725); cholangitis, 1.50% (95% CI, 0.60–3.60; I²=45.27; p=0.067); and perforation, 0.90% (95% CI, 0.40–1.90; I²=0; p=0.948). The overall adverse event rate was 9.70% (95% CI, 5.70–16.10; I²=83.39; p<0.001). Conclusions Primary precut sphincterotomy appears to be an effective and safe technique for biliary cannulation in ERCP. These findings support its consideration as a viable first-line approach in appropriate clinical settings.