Fig. 1. Literature review flowchart. Describes literature search methodology and exclusion criteria. MS, metal stent; PS, plastic stent.

Fig. 2. Forest plots for (A) clinical success, (B) technical success, (C) adverse events, (D) post-procedural cholangitis, (E) recurrent biliary obstructiona), (F) endoscopic reintervention, and (G) percutaneous drainage. M-H, Mantel-Haenszel; CI, confidence interval; MS, metal stent; PS, plastic stent. a)Denotes statistical significance.

Graphical abstract