Clinical trials

In France in 2018, there were an estimated 2,074 new cases of esophageal adenocarcinoma and 3,224 cases of squamous cell carcinoma. The estimated deaths from esophageal cancer were 3,725, with a standardized 5-year net survival rate of 20% for cases diagnosed between 2010 and 2015, mainly due to late diagnosis. Surgery was historically the standard treatment for localized disease but carries significant morbidity. Over the past decade, endoscopic treatments, particularly endoscopic submucosal dissection (ESD), have become the reference approach for superficial esophageal cancers. After endoscopic resection, histological analysis allows classification of recurrence risk into very low, low, and high categories. Predicting lymph node or distant recurrence is complex, depending on factors such as depth of wall infiltration, lymphovascular invasion, and tumor differentiation. The frequent combination of unfavorable histological features may have led to an overestimation of lymph node involvement risk in T1b cancers. ESD is widely performed in France, with over 1,600 procedures reported in 2023 for esophageal and gastric lesions, demonstrating the feasibility of a large observational study. This multicenter French cohort will evaluate technical, oncological, and organizational outcomes of esophageal ESD, including overall survival, recurrence-free survival, and management of residual Barrett's esophagus. It will also identify predictive factors for treatment success, recurrence, and complications, providing real-world evidence to guide patient management.

Obesity and overweight have emerged as public health problems of a pandemic nature, significantly reducing the life expectancy of those affected. Obesity has a considerable medico-economic impact, linked to the treatments it requires and its comorbidities. Currently, the prevention of obesity in our Western societies is not effective enough, as the prevalence and incidence of obesity and overweight continue to rise worldwide. In France, the therapeutic management of this condition is governed by the HAS and is summarized as a surgical approach for type 2 obesity with comorbidity or type 3 obesity, with three authorized methods that have shown sufficient evidence: gastric banding, sleeve gastrectomy (or longitudinal sleeve gastrectomy), and Roux-en-Y gastric bypass. With the advent of organ-preserving interventional endoscopy, the systematic use of these surgical methods, although effective for total weight loss and excess weight loss, raises questions. Indeed, these new therapeutic endoscopic approaches, which are less invasive, less costly, and respectful of anatomy, currently show convincing cohort results in the short term (12 to 24 months) and require confirmation of their effectiveness and safety in the long term (5 years) so that they can become first-line therapeutic methods in the near future. At the request of the HAS in its self-referral of 2020 and then in 2022, this prospective registry aims to confirm the effectiveness and safety of the endosleeve (or endoscopic sleeve) in the long-term therapeutic management of obesity within the framework of everyday practice in national reference centers for obesity treatment.

Prospective comparative observational study in numerous reference centers in France, comparing Tunnelization (Z-POEM) versus Non-Tunnelization Techniques according to the usual practices. This is a prospective, comparative, observational, multicenter study with the primary objective of comparing the symptomatic recurrence rate one year after endoscopic tunnelization therapy (Z-POEM) versus non-tunnelization techniques in patients with symptomatic Zenker's diverticulum.

Large prospective comparative observational study in numerous reference centers in France, comparing infectious complications in patients admitted for pancreatic cystic lesions (PCL) aspiration performed with or without antibiotic prophylaxis (ATBp) according to the usual practices. This is a prospective, comparative, observational, multicenter study, with the primary objective of comparing the infection rates in pancreatic cystic lesions (PCL) aspirated under EUS, with and without the administration of ATBp. A sample size of 1702 patients will be needed over a 3-year study period.

The aim of this prospective, controlled, randomized, multicentre, single-blind study is to compare the rate of intragastric migration of 2 types of esophageal stents with and without an anti-migration device placed for locally advanced or metastatic malignant stenosis of the gastroesophageal junction.