A 61-year-old woman presents to the emergency department with intermittent right upper quadrant pain for 3 days. Her medical history is significant for hypertension and symptomatic cholelithiasis. Medications include hydrochlorothiazide and amlodipine. Temperature is 37.0°C (98.6°F), blood pressure is 132/80 mm Hg, pulse is 88/min, and respiratory rate is 16/min. Physical examination reveals mild right upper quadrant abdominal tenderness without rebound or guarding. Laboratory studies show the following:
Ultrasonography demonstrates gallstones and dilation of the common bile duct.
Which of the following is the most appropriate next step in management?
The correct answer is:
B: Endoscopic retrograde cholangiopancreatography.
This patient has choledocholithiasis, demonstrated by cholestatic liver enzyme abnormalities and common bile duct dilation. Endoscopic retrograde cholangiopancreatography (ERCP) is both diagnostic and therapeutic because it allows stone extraction and biliary decompression. Definitive cholecystectomy is typically performed after duct clearance.
Answer choice A: Colonoscopy, is incorrect.
Colonoscopy evaluates colonic pathology and has no role in diagnosing or treating biliary obstruction.
Answer choice C: Immediate laparoscopic cholecystectomy without further intervention, is incorrect.
This is a sophisticated distractor because cholecystectomy is ultimately needed. However, common bile duct stones should generally be addressed first with ERCP.
Answer choice D: Oral ursodeoxycholic acid, is incorrect.
Medical dissolution therapy has limited effectiveness and is not appropriate for symptomatic common bile duct obstruction.
Answer choice E: Repeat ultrasonography in 6 months, is incorrect.
Persistent biliary obstruction can lead to cholangitis and pancreatitis. Definitive treatment is needed now.
Key Learning Point
Choledocholithiasis causes biliary obstruction and is typically managed with ERCP followed by cholecystectomy.
