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This article, published in the journal Endoscopy, examines the accuracy of non-expert endoscopists in detecting recurrent or residual adenoma (RRA) at an endoscopic resection scar. The study involved a survey with 15 high-definition white light and narrow-band imaging (NBI) images, a learning intervention on RRA detection, and another set of 15 high-quality images. The results showed that the accuracy of detecting RRA was relatively low among both experienced and inexperienced participants, but improved after the learning intervention. The study suggests that training can significantly mitigate the potential negative impact of underdiagnosing recurrence at an endoscopic resection scar. [Extracted from the article]

This article, published in the journal Endoscopy, discusses a surgical procedure called Submucosal Tunneling Endoscopic Resection (STER) used to remove a small gastrointestinal stromal tumor (GIST). The patient in this case preferred endoscopic excision over surveillance. During the procedure, two tissue strands were intentionally preserved to prevent the tumor from migrating into the peritoneal cavity. The GIST was successfully removed, analyzed, and the patient experienced no complications. The article provides a video demonstrating the procedure. [Extracted from the article]

This article discusses the impact of endoscopic resection scars on the accuracy of non-expert endoscopists in detecting cancer within large non-pedunculated colorectal polyps (LNPCPs). The study found that the presence of at least two Blink features (BF) reliably identifies cancer within LNPCPs, but not scars. Fold deformation was the only BF that was more commonly identified in scarred LNPCPs compared to no cancer, while other BF were less commonly identified in scarred polyps. The presence of at least two BF can help non-expert endoscopists distinguish between LNPCPs with cancer and those without, even in the presence of scarred lesions. [Extracted from the article]

This article, published in the journal Endoscopy, describes a case study of a 69-year-old female patient who underwent an upper GI endoscopy and was found to have a 50 mm gastric GIST (gastrointestinal stromal tumor). The tumor was located in the submucosal layer and had ulceration. The authors attempted a procedure called Submucosal Tunnelling Endoscopic Resection (STER), but due to the ulceration, they were unable to complete it. During the procedure, they discovered that the tumor had invaded the muscularis propria layer, resulting in a full-thickness defect in the gastric wall. The authors successfully closed the defect using an omental patch and through the scope endoscopic clips. The patient did not require any additional treatment and had negative follow-up results after 6 months. [Extracted from the article]

This article discusses the use of the JNET classification system in predicting the histology and submucosal invasion of large non-pedunculated colorectal polyps (LNPCPs). While Japanese endoscopists have achieved accuracies of over 84% with JNET, European experts have struggled to replicate these results, with an accuracy of only 55%. The study compares JNET with a novel tool called CRIS (Colorectal Regular-Irregular Score) among Western experts. The results show that both JNET and CRIS have similar overall accuracies, suggesting that JNET may be simplified for non-experts. Additionally, framing the interpretation of both systems in a clinically relevant fashion can increase their specificity. [Extracted from the article]

This article, published in the journal Endoscopy, explores whether video assessment is comparable to live assessment in determining submucosal invasion (SMI) in large non-pedunculated colorectal polyps (LNPCPs). The study involved blinded live assessments of LNPCPs by 15 endoscopists, followed by video assessments of the same polyps by other endoscopists. The results showed no significant difference in the accuracy of determining cancer presence and choice of treatment between live and video assessments. This finding suggests that video assessment could potentially reduce the need for patients to undergo additional procedures for assessing LNPCPs before resection. [Extracted from the article]

This article, published in the journal Endoscopy, discusses a case series involving three patients who were unfit for surgery due to T2N0M0 oesophageal adenocarcinoma (OAC). The patients underwent an endoscopic full thickness dissection (EFTD) using a 'tunnel technique' with the TriangleTipKnife J. The procedure involved making an incision into the muscularis propria and re-establishing the submucosal plane. The margins of the tunnel were dissected, resulting in a full thickness dissection of the OAC. All patients received a fully covered self-expanding metal stent, and during follow-up, no evidence of disease recurrence was found. [Extracted from the article]