Fig. 1. (A) Stent-by-stent deployment of metallic stents (Bonastent, Standard SciTech Inc., Seoul, Korea): two self-expandable metal stents were deployed parallelly into both IHDs and the distal tip of the two stents were positioned at the same level within CBD (left). (B) Stent-in-stent deployment of metallic stents in Bismuth type IV (Bonastent, Standard SciTech Inc.); The second stent was placed through the central portion of the first stent (X-marked stent). Following the deployment of the second stent, the bilateral metal stents were in a Y-configuration (right).
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