Zenker Peroral Endoscopic Myotomy Is Safe and Effective for the Management of Pharyngeal Pouch: A Multicentre...

Introduction: A Zenker diverticulum (ZD) is a sac-like outpouching at the pharyngo-oesophageal junction, which is characterised by dysphagia and regurgitation. Surgery has been the predominant treatment but carries the burden of invasiveness, complications, and recurrence. Zenker peroral endoscopic myotomy (Z-POEM) is an alternative minimally invasive endoscopic treatment for ZD. We report on the safety and efficacy of Z-POEM in the UK.

Consecutive patients undergoing Z-POEM by expert interventional endoscopists at four UK referral centres were retrospectively analysed between 2019 and 2024. Patient demographics, technical and clinical success, and 30-day adverse events were recorded. The primary outcome was clinical success, which was defined as a reduction in Dakkak and Bennett dysphagia score to ≤1 without need for repeat intervention.

Among 61 patients undergoing Z-POEM, the median age was 76 (IQR 69-80), 37.7% (n = 23) were female, mean pouch size was 37.3 mm (SD 18.0) in depth, and 37.3% had undergone prior intervention. The overall technical success was 100%, mean procedural time was 49.4 min (SD 19.3), and 10 patients underwent a hybrid procedure due to submucosal fibrosis. Overall, the clinical success was 93.1% over a mean follow-up of 11.2 months. There were five AEs related to the procedure classified as AGREE grade II (8.5%), and the recurrence rate was 11.1% over a median time of 7.5 months (IQR 6.3-10.3).

Z-POEM is a safe and effective endoscopic treatment for ZD that is associated with high technical and clinical success. A hybrid procedure may be utilised in the presence of submucosal fibrosis.