Endoscopic Submucosal Dissection for Early Esophageal Adenocarcinoma: Low Rates of Metastases in Mucosal Cancers with Poor Differentiation.

BACKGROUND AND AIMS: Endoscopic resection (ER) is accepted as standard treatment for intramucosal esophageal adenocarcinoma (EAC) with well or moderate differentiation. Poor differentiation (PD) is judged as a risk factor for lymph node metastasis (LNM) and surgery is recommended. However, the evidence for this recommendation is weak. Study aim was to analyze the clinical course of patients after ER of EAC with PD. PATIENTS AND METHODS: Patients undergoing endoscopic submucosal dissection for EAC were included from 16 German centers. Inclusion criteria were PD in the resection specimen, R0 resection and endoscopic follow-up. Primary outcome was the metastasis rate during follow-up. Analysis was performed retrospectively in a prospectively collected database. RESULTS: 25 patients with PD as single risk factor (group A) and 15 patients with PD and additional risk factors (submucosal invasion and/or lymphovascular invasion) were included. The metastasis rate was was 1/25 (4.0%; 95%CI 0.4-17.2) in group A and 3/15 (20.0%; 95%CI 6.0-44.4%) in group B, respectively (p=0.293). The rate of EAC-associated deaths was 1/25 (4%; 95%CI 0.4-17.2%) versus 3/15 (20%; 95%CI 6.0-44.4%) in group B (p=0.293) while the overall death rate was 7/25 (28.0%; 95%CI 13.5-47.3%) versus 3/15 (20%; 95%CI 6.0-44.4%) (p=0.715). Median follow-up was 30 months (IQR 15-53). CONCLUSIONS: During long-term follow-up the risk of metastasis is low after ER of mucosal EAC with PD as single risk factor. A conservative approach seems justified in this small patient group. However, the treatment strategy has to be determined on an individualized basis until further prospective data are available.

[Results of motorized spiral enteroscopy in 83 consecutive patients]. / Ergebnisse der motorisierten Spiralenteroskopie des Dünndarms an 83 konsekutiven Patienten.

INTRODUCTION: For motorized spiral enteroscopy, only limited data are available. We report about our early experiences with the motorized spiral enteroscopy in a retrospective case series. The present worldwide study reported the results of motorized spiral enteroscopy in 68 patients with small bowel diseases and in 15 patients with ERCP and surgically altered anatomy. PATIENTS AND METHODS: This retrospective single-centre study was performed between 01/2020 and 09/2021 in 83 consecutive patients. Indications were known or suspected small bowel diseases or diseases of the bile or pancreatic duct after surgical altered anatomy with Roux-Y anastomosis. RESULTS: In 68 patients (38 m/30 f; mean age 66.4 years) with an indication for small bowel enteroscopy, diagnostic and therapeutic yield was 86.8% and 41.2%, respectfully. The average depth of maximum insertion was 279 cm with an average insertion time of 64.3 min. In 13 patients (19.7%), complete panenteroscopy was achieved. In patients without prior abdominal surgery, the rate of complete enteroscopy was 46.2%.In 15 patients (9 m; 6 f; mean age 61.8 years) with surgically altered anatomy and Roux-Y anastomosis (the papilla resp.), the biliodigestive anastomosis could be reached in 60%.In the entire case series, the total complication rate was 15.7%. There were no severe complications, such as perforation or major bleeding. DISCUSSION: The present case series shows a high rate of panenteroscopies with a short examination time. To confirm these data, further comparative studies for ERCPs in patients with surgically altered anatomy are necessary.

Hybrid resection of large colorectal adenomas combining EMR and FTRD.

BACKGROUND: The introduction of the full-thickness resection device (FTRD) allowed resection of difficult adenomas in the duodenum and colorectum with non-lifting. The main limitation of this endoscopic technique is the lesion size. We describe a hybrid approach combining endoscopic mucosal resection (EMR) and FTRD in a cohort of 17 patients to reduce tumor size and enable full-thickness resection. METHODS: Retrospective analysis from data of 17 patients who underwent hybrid EMR-FTRD for large adenomas in the colorectum at our institution. Technical success, histological confirmation of margin-free resection and adverse advents were studied. RESULTS: 16 of 17 (94.1%) lesions could be resected macroscopically complete with confirmed full-thickness resection. Histological work-up of the full-thickness specimens showed free lateral margins in 13 patients (76.4%), unclear margins in two patients (11.8%) and positive margins in two patients (11.8%). There were no immediate perforation or major bleeding, however one patient showed a stenosis after resection in the follow-up endoscopy. Follow-up endoscopy was available in 12 patients. In two of 12 patients a recurrent adenoma was detected. CONCLUSIONS: Hybrid EMR-EFTR in the colorectum seems to be a safe and effective technique for large non-lifting lesions with positive lifting signs in the margins. Further prospective evaluation of efficacy, safety and long-term outcome of this hybrid technique is necessary.

Endoscopic prediction of submucosal invasion in Barrett's cancer with the use of artificial intelligence: a pilot study.

BACKGROUND: The accurate differentiation between T1a and T1b Barrett's-related cancer has both therapeutic and prognostic implications but is challenging even for experienced physicians. We trained an artificial intelligence (AI) system on the basis of deep artificial neural networks (deep learning) to differentiate between T1a and T1b Barrett's cancer on white-light images. METHODS: Endoscopic images from three tertiary care centers in Germany were collected retrospectively. A deep learning system was trained and tested using the principles of cross validation. A total of 230 white-light endoscopic images (108 T1a and 122 T1b) were evaluated using the AI system. For comparison, the images were also classified by experts specialized in endoscopic diagnosis and treatment of Barrett's cancer. RESULTS: The sensitivity, specificity, F1 score, and accuracy of the AI system in the differentiation between T1a and T1b cancer lesions was 0.77, 0.64, 0.74, and 0.71, respectively. There was no statistically significant difference between the performance of the AI system and that of experts, who showed sensitivity, specificity, F1, and accuracy of 0.63, 0.78, 0.67, and 0.70, respectively. CONCLUSION: This pilot study demonstrates the first multicenter application of an AI-based system in the prediction of submucosal invasion in endoscopic images of Barrett's cancer. AI scored equally to international experts in the field, but more work is necessary to improve the system and apply it to video sequences and real-life settings. Nevertheless, the correct prediction of submucosal invasion in Barrett's cancer remains challenging for both experts and AI.

Repeat full-thickness resection device use for recurrent duodenal adenoma: A case report.

BACKGROUND: Endoscopic full-thickness resection of adenomas or subepithelial tumors is a novel and promising endoscopic technique. There have been several recent studies of full-thickness resection device (FTRD) use in the colon, but data regarding its use and efficacy in the duodenum are still limited. CASE SUMMARY: A 64-year-old female underwent resection of a recurrent adenoma of 7 mm in size in the duodenum after FTRD use for an adenoma eight months prior. The biopsies revealed a low-grade adenoma. The adenoma was removed using the gastroduodenal FTRD, and the pathology results revealed clear margins. Except for minor bleeding that was treated by argon plasma coagulation, no further complications occurred. CONCLUSION: Repeat use of the FTRD appears to be a safe and efficacious approach for the treatment of recurrent duodenal lesions. Further prospective studies are needed to investigate the long-term safety and utility of repeat FTRD use after Endoscopic full-thickness resection.

Design and validation of a bioreactor for simulating the cardiac niche: a system incorporating cyclic stretch, electrical stimulation, and constant perfusion.

To simulate the cardiac niche, a bioreactor system was designed and constructed to incorporate cyclic stretch, rhythmic electrical stimulation, and constant perfusion. The homogeneity of surface strain distribution across the cell culture substrate was confirmed with ARAMIS deformation analysis. The proliferation marker, Ki-67, detected in human umbilical vein endothelial cells and 3-[4,5-dimethyl-thiazol-2-yl]-2,5-diphenyltetrazolium bromide cytotoxicity assay performed on human atrial fibroblasts confirmed biocompatibility of this novel device. Cyclic stretch treatment for 24 h resulted in the perpendicular alignment of human atrial fibroblasts. An electrical stimulation system containing carbon electrodes was characterized by electrochemical impedance spectroscopy and charge injection/recovery studies, which indicated that increased corrosive reactions were associated with a higher input voltage and prolonged pulse duration. Field stimulation delivered through this system could induce rhythmic contractions in adult rat ventricular myocytes, with contractile characteristics similar to those paced in a standard field stimulation chamber. In conclusion, this bioreactor provides a novel tool to study the interaction between physical stimulation and cardiac cell physiology.

The special effects of hypnosis and hypnotherapy: A contribution to an ecological model of therapeutic change.

There is ample evidence that hypnosis enhances the effectiveness of psychotherapy and produces some astounding effects of its own. In this paper, the effective components and principles of hypnosis and hypnotherapy are analyzed. The "special" hypnotic and hypnotherapeutic effects are linked to the fact that the ecological requirements of therapeutic change are taken into account implicitly and/or explicitly when working with hypnotic trances in a therapeutic setting. The hypnotic situation is described--theoretically and in case examples--as a therapeutic modality that gratifies and aligns the basic emotional needs to feel autonomous, related, competent, and oriented. It is shown how the hypnotic relationship can help promote a sound ecological balance between these needs--a balance that is deemed to be a necessary prerequisite for salutogenesis. Practical implications for planning hypnotherapeutic interventions are discussed.