Novel concept of bared type metallic stent for endoscopic bilateral stent-in-stent placement in patients with hilar malignant biliary obstruction (with video).

Highlight Takenaka and colleagues report on a novel bare uncovered self-expandable metal stent developed to be compatible with only 0.025-inch guide wires. This unprecedented feature makes the delivery tip thinner and more flexible than the conventional type and useful for endoscopic bilateral stent-in-stent placement in patients with hilar malignant biliary obstruction.