MSFinals-6746

A 31-year-old woman complains of abdominal pain, nausea, and vomiting. An ultrasound scan reveals the presence of gallstones and an abnormal dilation of the common bile duct measuring 7 mm. The patient is currently taking morphine for pain relief. After four hours, the pain subsides, and she is discharged without any symptoms. Two weeks later, she returns for a follow-up visit and reports being symptom-free. What is the most appropriate next step in managing her condition?