Fig. 2

Endoscopic retrograde cholangiopancreatography. A Fluoroscopy revealed a small stone (arrow) in a non-dilated bile duct with low insertion of the cystic duct. B A biliary balloon dilator became impacted in the bile duct. C The shaft of the balloon broke when the scope fell back into the stomach. D The shaft slipped out of the transparent balloon sheath (arrows) when pulled with a snare. E, F The stone-and-balloon complex was successfully removed with rat-tooth forceps