Many options are available for management of common bile duct stones. the most recent development in this field is single-session approach by one of two methods; laparoscopic common bile duct exploration and intraoperative endoscopic sphincterotomy. In this study, the investigators prospectively compare these two methods for management of patients with preoperatively diagnosed common bile duct stones to settle the best option.

Inclusion Criteria:

• preoperatively diagnosed common bile duct stones

Exclusion Criteria:

• liver cirrhosis pregnancy ASA III, IV Previous abdominal surgery postcholecystectomy