Impact of prior treatment on feasibility and outcomes of Zenker's peroral endoscopic myotomy (Z-POEM).

Background: Zenker's peroral endoscopic myotomy (Z-POEM) is a novel procedure for the management of symptomatic Zenker's diverticulum. This study aims to report the technical feasibility and outcomes of Z-POEM in the management of Zenker's diverticulum after prior failed interventions.

Methods: Patients with persistent or recurrent symptoms after prior endoscopic and/or surgical intervention for Zenker's diverticulum were retrospectively included.