Impact of periampullary diverticula on the rates of successful cannulation and ERCP complications: An up-to-date systematic review and meta-analysis.

Abstract

Periampullary diverticulum (PAD) is usually incidentally discovered during abdominal imaging, gastrointestinal endoscopy, and endoscopic retrograde cholangiopancreatography (ERCP). The influence of PAD on ERCP outcomes is unclear. The aim of this systematic review and meta-analysis was to provide an up-to-date evaluation of the impact of PAD on cannulation and ERCP-related complications. PubMed, Web of Science, Cochrane Library and EMBASE databases were searched for relevant articles published up to October 31, 2023. The rates of successful cannulation and post-ERCP complications were compared between the PAD and non-PAD groups. The quality of the studies was evaluated with the Newcastle-Ottawa Scale (NOS). The meta-analysis was conducted using Review Manager 5.3. Twenty-eight articles were included. Non-PAD was associated with a relatively high cannulation success rate (odds ratio [OR] 0.72, 95% confidence interval [CI] 0.54-0.97, p = 0.03). However, after 2015, PAD was not correlated with cannulation failure (OR 0.81, 95% CI 0.59-1.11, p = 0.20). Compared with intradiverticular papilla (IDP), non-IDP had a higher successful cannulation rate (OR 0.42, 95% CI 0.25-0.72, p = 0.002), while IDPincreased the difficult cannulation rate (OR 1.60, 95% CI 1.05-2.44, p = 0.03). Additionally, PAD increased the incidence of ERCP-related pancreatitis (OR 1.24, 95% CI 1.10-1.40, p = 0.0006) and bleeding (OR 1.34, 95% CI 1.03-1.73, p = 0.03). Although PAD, especially IDP, decreased the cannulation success rate, PAD was no longer considered a significant obstacle to cannulation after 2015. PAD increased the incidence of post-ERCP pancreatitis and bleeding.