<prompt> The treatment of choice for an 8 mm retained common bile duct CBD stone is:Laparoscopic CBD explorationPercutaneous stone extractionEndoscopic stone extractionExtracorporeal shock wave lithotripsy  <response>: Treatment of Choledocolithiaisis Stone 1.5 cm --ERCP Stone Removal ERCP is both diagnostic and therapeutic as stenting procedures may be done to allete the obstruction. Stone 1.5cm - Choledochotomy When distal obstruction is suspected- Choledochoduodenostomy 