Fig. 1. Endoscopic stent-in-stent (SIS) showing a Y-shaped configuration after the deployment of two stents into both intrahepatic bile ducts (IHDs) due to the second stent passing through the first deployed metal stent. Distal margins of each stent are positioned within the common bile duct (CBD) (A). Stent-by-stent (SBS) deployment shows parallel configuration of two metal stents into both IHDs. Each stent is positioned within the CBD above the level of the major papilla (B).
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