Endoscopic Treatment of Zenker's Diverticulum (ZENKTUN)

Inclusion Criteria: * Patients with symptomatic Zenker's diverticulum (Augsburg score ≥5 ) * Diagnostic evaluation including esophagogastroduodenoscopy (EGD) and a barium swallow (TOGD) with measurement of the diverticulum's height. * Patient aged 18 years or older * Patient with ASA 1, ASA 2, ASA 3 status * No participation in another concurrent clinical study Exclusion Criteria: * Patient under 18 years old * Patient with ASA 4 or ASA 5 status * Pregnant woman * Patient with coagulation disorders preventing the performance a polypectomy: PT \< 50%, Platelets \< 50,000/mm³, ongoing effective anticoagulation, or current clopidogrel use. * Patient who has already undergone initial endoscopic or surgical treatment for Zenker's diverticulum