In ERCP for suspected choledocholithiasis, which clinical and biochemical combination has the highest predictive value for common bile duct stones, allowing direct ERCP without prior EUS or MRCP?
- A Bilirubin 2–4 mg/dL + dilated CBD on ultrasound
- B Cholangitis AND bilirubin >4 mg/dL AND CBD >6 mm on ultrasound (all three present — high probability) ✓
- C Any two of: bilirubin >4 mg/dL, CBD >8 mm on ultrasound, or clinical cholangitis
- D Elevated ALP with normal bilirubin
Correct answer: B. Cholangitis AND bilirubin >4 mg/dL AND CBD >6 mm on ultrasound (all three present — high probability)
Explanation
ASGE (American Society for Gastrointestinal Endoscopy) predictors of choledocholithiasis: Strong predictors — CBD stone on imaging, clinical cholangitis, bilirubin >4 mg/dL; Moderate predictors — dilated CBD (>6 mm), bilirubin 1.8–4 mg/dL, abnormal LFTs. HIGH probability (proceed directly to ERCP) requires any strong predictor OR two or more moderate predictors. Clinical cholangitis + bilirubin >4 + CBD >6 mm represents very high probability. Intermediate probability patients undergo EUS/MRCP first.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.