EUS vs MRCP for detection of choledocholithiasis

Area of Science:

• Gastroenterology
• Diagnostic Imaging
• Biliary System Diseases

Background:

• Choledocholithiasis detection is crucial for managing biliary disease.
• Endoscopic retrograde cholangiopancreatography (ERCP) has been a benchmark, but less invasive methods are preferred.
• Endoscopic ultrasound (EUS) and magnetic resonance cholangiopancreatography (MRCP) show promise for diagnosing common bile duct stones.

Purpose of the Study:

• To systematically compare the diagnostic accuracy of EUS versus MRCP for detecting choledocholithiasis.
• To evaluate randomized, prospective trials assessing EUS and MRCP performance against a gold standard.

Main Methods:

• Systematic review of 5 randomized, prospective, blinded trials identified via MEDLINE.
• Analysis included 301 patients with suspected biliary disease.
• Diagnostic performance metrics (sensitivity, specificity, predictive values, likelihood ratios) were calculated and aggregated.

Main Results:

• Pooled sensitivities: EUS 0.93, MRCP 0.85. Pooled specificities: EUS 0.96, MRCP 0.93.
• Pooled positive predictive values: EUS 0.93, MRCP 0.87. Pooled negative predictive values: EUS 0.96, MRCP 0.92.
• No statistically significant differences in diagnostic accuracy were found between EUS and MRCP.

Conclusions:

• Both EUS and MRCP offer high diagnostic performance for choledocholithiasis.
• The choice between EUS and MRCP may depend on factors beyond diagnostic accuracy, such as cost and availability.
• Further research could explore patient outcomes based on modality selection.