An introducer is positioned (asterisk). The stent, together with the delivery system (white arrow), is inserted along the guidewire through the lumen of the introducer. The radiopaque mark on the delivery system (arrowhead) is located 1 cm above the proximal end of the plastic biliary stent, which will be positioned inside the bile duct (above the point of obstruction). Under fluoroscopy, we carefully visualize the radiopaque mark on the delivery system (black arrow), which delimits the distal portion of the plastic stent, and position it approximately 5 cm below its anchoring in the duodenum.