Fig. 2. Institutional guideline of preoperative and postoperative management of the patient who has abdominal symptoms suspecting cholelithiasis. USG, ultrasonography; GB, gallbladder; CBD, common bile duct; ERCP, endoscopic retrograde cholangiopancreatography; MRCP, magnetic resonance cholangiopancreatography; LFT, liver function test; FU, follow-up.