Is endoscopic papillary large balloon dilatation without endoscopic sphincterotomy effective?

Figure 1 Fluoroscopic and endoscopic view of a bile duct. A: Multiple large bile duct stones and marked dilation of the common bile duct; B: Endoscopic papillary dilatation with a large (15-18 mm) balloon. Endoscopic sphincterotomy was not performed before balloon sphincteroplasty. This case features incomplete disappearance of the waist; C: An inflated balloon; D: A large biliary orifice was obtained; E: Large stones extraction using a retrieval balloon.