Endoscopic management of difficult common bile duct stones: Where are we now? A comprehensive review

Abstract

Endoscopic management for difficult common bile duct (CBD) stones still presents a challenge for several reasons, including anatomic anomalies, patients’ individual conditions and stone features. In recent years, variable methods have emerged that have attributed to higher stone removal success rates, reduced cost and lower adverse events. In this review, we outline a stepwise approach in CBD stone management. As first line therapy, endoscopic sphincterotomy and large balloon dilation are recommended, due to a 30%-50% reduction of the use of mechanical lithotripsy. On the other hand, cholangioscopy-assisted lithotripsy has been increasingly reported as an effective and safe alternative technique to mechanical lithotripsy but remains to be reserved in special settings due to limited large-scale evidence. As discussed, findings suggest that management needs to be tailored to the patient’s characteristics and anatomical conditions. Furthermore, we evaluate the management of CBD stones in various surgical altered anatomy (Billroth II, Roux-en-Y and Roux-en-Y gastric bypass). Moreover, we could conclude that cholangioscopy-assisted lithotripsy needs to be evaluated for primary use, rather than following a failed management option. In addition, we discuss the importance of dissecting other techniques, such as the primary use of interventional endoscopic ultrasound for the management of CBD stones when other techniques have failed. In conclusion, we recognize that endoscopic sphincterotomy and large balloon dilation, mechanical lithotripsy and intraductal lithotripsy substantiate an indication to the management of difficult CBD stones, but emerging techniques are in rapid evolution with encouraging results.

Keywords: Common bile duct stones; Balloon dilation; Endoscopic retrograde cholangiopancreatography; Endoscopic ultrasonography; Anastomoses, Roux en y; Double balloon enteroscopy; Mechanical lithotripsy; Cholangioscopy

Core Tip: The endoscopic management of difficult common bile (CBD) stones remains a challenge, whilst emerging techniques such as endoscopic sphincterotomy and large balloon dilation, mechanical lithotripsy and intraductal lithotripsy provide a procedural indication that align with the patient’s condition, comorbidities, feature of the CBD stone and the patient’s anatomical features. This review focuses on comprehensively outlining a stepwise approach for the management of difficult CBD stones and comparatively discusses indications depending on surgical altered anatomy and future indications in the management of difficult CBD stones.