Cholelithiasis Diagnosis and Management

Diagnostic Criteria

• Ultrasound is highly accurate at diagnosing gallstones with a reported accuracy of 96% 1
• Gallstones appear as echogenic foci within the gallbladder lumen that typically cast acoustic shadows 2
• The American College of Radiology recommends documenting the number, size, and mobility of stones in imaging reports 2
• Normal gallbladder wall thickness is less than 3mm, and thickening greater than 3mm may indicate inflammation 1, 2

Diagnostic Evaluation

• The presence of mobile gallstones, normal common bile duct diameter, and absence of pericholecystic fluid are characteristic ultrasound findings in cholelithiasis 1, 2, 3
• The American College of Radiology recommends evaluating the common bile duct for stones, as direct visualization on ultrasound is a strong predictor of choledocholithiasis 2
• If common bile duct stones are suspected despite negative ultrasound, additional imaging such as MRCP may be warranted 2

Clinical Significance and Management

• The American College of Radiology states that sonographic Murphy's sign is not a reliable indicator of acute cholecystitis, with low specificity 1, 2
• Early laparoscopic cholecystectomy is not necessary for uncomplicated cholelithiasis, but may be recommended for acute cholecystitis 5
• The World Journal of Emergency Surgery recommends laparoscopic cholecystectomy within 72 hours of diagnosis for acute cholecystitis 5