Zenker Diverticulum

This is prospective data recording study. All patients will receive standard medical care and no experimental interventions will be performed.

Advanced therapeutic endoscopy procedures are of increasing importance to provide minimal invasive treatment for GI diseases. The Centre Hospitalier de l'Université de Montréal as tertiary university center is dedicated to increase the availability of therapeutic endoscopy procedures for our population in Montreal and Quebec. Advanced endotherapeutic endoscopy can replace surgery for treatment of benign and malign GI diseases and the aim of this registry-based study is to improve quality related to advanced endotherapeutic endoscopy, as it will provide quantitative means to assess advanced endotherapeutic practice and may identify practices of low quality (possible intervention) or high quality (desired).

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.

Patients undergoing open transcervical or endoscopic approach in which a laser or stapler is used to divide the common wall between the diverticulum and esophagus, or who are not surgical candidates but agree to follow-up.

Zenker's diverticulum (ZD) is a rare benign condition, due to an acquired sac-like outpouching of the mucosa and submucosa layers originating from the pharyngoesophageal junction. Endoscopic techniques like flexible endoscopic septum division (FESD) or per-oral endoscopic septotomy (POES), represent a minimally invasive alternative to surgery or to rigid endoscopic procedure to treat ZD. The goal of the research will be to evaluate the safety of the procedures and to measure Zenker-symptom severity in all patients treated by endoscopic procedures.